But it didn’t say how it would overcome technology barriers, such as finding a way for a smartphone to connect to the register without requiring a consumer to get a new phone with a near-field communication chip, or without making the retailer buy fancy new hardware.

Today, it announced an acquisition that may be one way it could solve this costly dilemma.

On the PayPal blog today, the company announced that PayPal has acquired Fig Card, which has developed a way for merchants to accept mobile payments by using a low-cost USB device that plugs into the cash register or point-of-sale terminal. Customers will have to install the Fig app on their smartphones.

“We loved their approach to point-of-sale, particularly because it was driven by the same vision that we have at PayPal–in the future, transactions can be as smart as a computer and not as dumb as paper. We won’t need our physical wallets. We’ll be able to pay any way we want, from any device, anywhere in the world with both flexibility and privacy,” said Peter Chu, PayPal Mobile’s senior director.

Fig Card was founded in early 2010 by Hasty Granbery and Max Metral, who will be joining the PayPal team. On the company’s Web site, it admits that the obvious challenge for the company is its small size, but that it was moving forward with trials among a handful of merchants in Boston’s south end.

Prior to founding Fig, Metral was co-founder and CTO of Firefly, which was bought by Microsoft. At Microsoft, he developed Microsoft Passport, one of the first single-sign-on systems. He then co-founded PeoplePC, where he met Granbery. PeoplePC was purchased by Earthlink.

If you spend any time with eBay at all, it’s clear that a lot of its emphasis is on PayPal. On Wednesday, it noted the division’s contribution to revenue growth in the first quarter and said in the first three months of the year, PayPal added one million accounts for the sixth quarter in a row. It now expects to achieve 100 million active accounts by the end of next quarter.

Additionally, PayPal was just shy of hitting its first billion-dollar quarter, and now represents 39 percent of the company’s overall revenues. To support its goals further, eBay recently acquired WHERE, a location-based mobile services and ad network.

While PayPal is one of the longest-standing online payment providers, it faces steep competition in the digital payment space from both incumbent providers and new entrants.

For instance, the Fig technology sounds similar to what Square is trying to accomplish by passing out dongles that can enable virtually any smartphone to accept payments. Square announced this week that it received an investment by Visa. Other giants like Google are getting into the space, and additionally, Facebook is becoming a big player in the space with the roll-out of Credits, a system used today to pay for virtual goods, digital items, and, increasingly, physical goods, like daily deals.

As everyone knows by this morning, Spot Runner–the heavily-funded and once-hyped online-offline advertising agency–is being sued by one of its more prominent investors.

Ad behemoth WPP, which is making a variety of harsh allegations in a lawsuit filed about two weeks ago, is saying it is still not too big to be snookered by the start-up’s top execs and some of its other investors.

WPP (WPPGY), which has been quite active in making digital ad investments over the last several years, is alleging that Spot Runner sold over $54 million in “secondary” shares to line its own pockets without telling WPP much, all while losing money, running out of funding and not building a sustainable business.

The lawsuit essentially paints an ugly picture of Spot Runner as the Bernie Madoff of Web 2.0.

In its strongest phrasing, the lawsuit alleges:

“Rather than working to make Spot Runner a successful and profitable venture, they perpetuated a ‘pump-and dump’ scheme in which they aggressively promoted the Company to new investors (often by promoting that WPP was an investor in and supported of the Company) and then sold new investors large quantities of their own secondary shares at ever-increasing valuations. Such secondary sales were accomplished surreptitiously and without disclosures to Investors required by the controlling Investor agreements or federal and state securities laws.”

Those named in the suit include: Spot Runner CEO and co-founder Nick Grouf, CTO and co-founder David Waxman, venture investors Battery Ventures and Index Ventures, and board members, such as former AOL exec Robert Pittman.

This is obviously a bad turn of events for Spot Runner, which is currently reeling from the advertising downturn too.

Before that, it had gotten over $100 million in funding from a strong slate of investing luminaries.

Investors included international media giants Daily Mail and General Trust and Grupo Televisa, investment company Legg Mason Capital Management (LM) and luxury conglomerate Groupe Arnault/LVMH.

Spot Runner’s previous investors are Allen & Company, Battery Ventures, Comerica Bank (CMA), Lachlan Murdoch, Vivi Nevo, Capital Research and Management, CBS (CBS), Index Ventures, Interpublic Group (IPG), Tudor Investment Corporation and WPP.

All that money had, when times were good, given Spot Runner an eye-popping valuation upward of $500 million.

And that’s the very kind of bubble economics that apparently allowed some at the company to make those lucrative secondary sales the lawsuit alleges, with lots of demand to get in to the latest hot start-up.

To be clear, such sales are not uncommon at tech start-ups in Silicon Valley, often done to allow entrepreneurs to take some money off the table, especially if there is no clear path to liquidation.

But the scope of the sales alleged is quite unusual, with Grouf getting half the proceeds of the transactions, which were made from early 2006 to early 2008.

That said, WPP–which is seeking $11.5 million in damages, as well as legal fees, after investing $10 million–leaves itself open to its own tsk-tsking, since it finally got to participate some in the sales too, dumping $900,000 worth of shares in the last one.

That makes it seem like WPP is just miffed that it did not get enough while the getting was good, which is underscored by the small amount of money being asked for in the lawsuit, in comparison to the large and loud accusations.

Worse still, perhaps, for everyone involved, is the suit’s revelation that Spot Runner was not the revenue geyser it had touted itself as being–which should not come as a huge shock to anyone who has followed any Web 2.0 company in an even cursory way.

Very few, including the star, Facebook, make money, as BoomTown and others have pointed out a lot to little interest.

The lawsuit says the profit-free Spot Runner had $5 million in revenue in 2007 and $9 million in 2008. It alleges too that the company only has $20 million left of its funding and is spending $35 million to $45 million a year.

That’s because Spot Runner was trying to create a new online ad system, which was essentially a do-it-yourself model that tries to iron out inefficiencies in the buying and selling of advertising and bridge the gap between the traditional and online ad markets. It has since changed its strategy and is working on other products, such as a digital-media buying platform called Project Malibu.

Other than Spot Runner’s statement that it would defend itself vigorously, there were mostly no comments all around.

“This situation is unfortunate; we had hoped that we would have had a long relationship with WPP. We believe the claims are without merit and we will vigorously defend against them, including taking all necessary legal action to protect Spot Runner’s reputation,” said a Spot Runner spokeswoman in a statement.

But one source close to the Spot Runner side, while not addressing the specific allegations, noted in an interview with me that what looks bad now did not then:

“These are different times and things look differently.”

You can say that again. And again after that.

As point of that fact, check out a video I did, below, with Grouf last July at Spot Runner offices in Los Angeles, right after it had gotten one of its giant piles of money. (Grouf is pictured here.)

This video took place right after a lot of the transactions that the lawsuit alleges, which makes sense since Spot Runner was the hot start-up at that moment and many would have been trying to get into the action.

I met Grouf many years ago when he–along with Waxman–founded PeoplePC and Firefly Networks.

Grouf sold the struggling PeoplePC–which hawked computers bundled with an online service–to Earthlink (ELNK) in 2002 for $10 million and assumption of $35 million in liabilities, in a Web 1.0 meltdown deal that followed a disastrous IPO.

But with a hot new start-up, everything looked pretty again, perhaps too pretty, for Grouf.

As I wrote at the time about the hype, which including rumors of Spot Runner being sold for big bucks to Google (GOOG) or Microsoft (MSFT):

“This is its biggest burden, I think, setting expectations very high for what is still a little start-up…Who knows whether the company will be able to overcome its hype, but time (and money) will tell.”

Obviously, we can tell a lot more now.

Here’s the Grouf video (the full lawsuit text and a memo Spot Runner sent to employees about it are also below):

Here is the full lawsuit (click on + button to zoom in):

And, finally, here is the letter Spot Runner sent to employees, who have suffered from layoffs, about the lawsuit:

Team,

As you may have heard, WPP, a minority shareholder (less than 3%) in Spot Runner since 2006, filed a lawsuit against the company and its board members primarily related to the sale of Spot Runner stock and Spot Runner’s communications with WPP. This situation is unfortunate, as we appreciate and value the relationships we have with all of our investors and we had hoped for a long and supportive relationship with WPP. We believe these claims are without merit and we will vigorously defend against them, including taking all necessary legal action to protect Spot Runner’s reputation.

We feel strongly that WPP’s complaint contains many baseless accusations and we want to give you a broader perspective on the matter. This lawsuit is unrelated to our products and services–it is centered on legal agreements entered into with WPP, a sophisticated investor, regarding the way that shareholder stock sales were handled. WPP alleges that Spot Runner’s board members failed to disclose to WPP the stock sales by shareholders, allegedly in violation of the board’s obligations to stockholders, among other things.

We are confident that Spot Runner complied with all of its obligations under the various shareholder agreements. When these sales occurred, there was overwhelming demand for Spot Runner stock and the company did not want to dilute existing shareholders by issuing new shares. Therefore, the founders (in 2006) and the board members and other preferred shareholders (in 2007 and early 2008) agreed to make room for important, new investors and respond to their desire to invest in Spot Runner by selling their own shares. In 2007 and 2008, WPP and other preferred shareholders were given notice that the sales were occurring and they had the opportunity to participate in the sales. In fact, WPP signed various documents acknowledging this opportunity.

Spot Runner and all of its employees conduct business with the utmost integrity. Our team, technologies, and products and services are core assets of which we can all be proud. It is because of your hard work that we have come this far. To that end, we continue to drive hard toward successfully launching Project Malibu and realizing its full potential. You also should know that our board members remain majority shareholders in Spot Runner–a concrete sign of their commitment to and confidence in the business.

Our outside counsel will work with the board and management team to develop a formal reply, which ultimately will be filed with the court. These legal proceedings should not affect our day-to-day operations.

We are grateful that we can count on you to remain focused on serving our clients and partners to the best of your abilities.

Thank you again for all that you do for Spot Runner.

On one of my many trips to Los Angeles (what can I say? I like to hang where LoRo* hangs), I dropped in to see Nick Grouf of Spot Runner.

As many might know, Spot Runner is an online-offline ad agency play that has gotten big funding and even bigger hype of late.

We’ll see how that goes. But Spot Runner actually seems to be tackling an underserved (and unexciting) market of local and national clients in need of cheap online ad solutions married to more traditional marketing venues to boost revenue.

Here’s my video interview with Grouf at Spot Runner’s offices on Wilshire Boulevard:

I met Grouf many years ago when he–along with Spot Runner partner David Waxman–founded PeoplePC and Firefly Networks.

Grouf sold the struggling PeoplePC–which hawked computers bundled with an online service–to Earthlink (ELNK) in 2002 for $10 million and assumption of $35 million in liabilities, in a Web 1.0 meltdown deal that followed a disastrous IPO.

He then started working for the Presidential campaign of Sen. John Kerry, helping figure out how to best and most cheaply place critical television ads–crunching all sorts of data about lots and lots of neighborhoods and towns and cities nationwide to figure it out.

What Grouf figured out, though, was that a system for doing so was nonexistent.

That experience turned into Spot Runner, which is essentially a do-it-yourself model that tries to iron out inefficiencies in the buying and selling of advertising and bridge the gap between the traditional and online ad markets.

Offering cheap ad templates, clients can make and place low-cost television and radio ads for small and national businesses, as well as political campaigns, and get analytics about the impact of the ads. Some ads cost as low as $500.

Spot Runner got a pile of cash to try to do that better, recently nabbing $51 million in funding to add to the $60 million already raised.

Investors include international media giants Daily Mail and General Trust (DMGT.L) and Grupo Televisa (TV), investment company Legg Mason Capital Management (LM) and luxury conglomerate Groupe Arnault/LVMH (MC.PA).

Spot Runner’s previous investors are Allen & Company, Battery Ventures, Comerica Bank (CMA), Lachlan Murdoch, Vivi Nevo, Capital Research and Management, CBS (CBS), Index Ventures, Interpublic Group (IPG), Tudor Investment Corporation and WPP.

Its board includes Index’s Danny Rimer and former AOL exec Bob Pittman.

All that money has given Spot Runner an eye-popping valuation upwards of $500 million.

This is its biggest burden, I think, setting expectations very high for what is still a little start-up.

And while there are rumors of both Microsoft and Google, as well as Comcast, being interested in acquiring the company, Grouf dismisses the speculation.

He says Spot Runner is more intent on using the money raised to buy companies and improve its offerings.

For example, it recently bought Weblistic, a local search listings creator, and hired former Microsoft exec Joanne Bradford.

Bradford, who was a VP and chief media officer of MSN Media Network, is executive vice president of National Marketing Services at Spot Runner, focusing on getting national advertisers to also think small and targeted.

Who knows whether the company will be able to overcome its hype, but time (and money) will tell.

(*And a free D6 bag for anyone who correctly identifies who I am referring to here, either by sending in a comment or an email to me at kara@allthingsd.com.)