BoomTown arrived late to the Facebook mobile event for the press due to traffic related to the parade today for the San Francisco Giants’ World Series victory–and where I would much rather be right now.

Go Giants!

10:53 am PT: In any case, I am here in the cafeteria of Facebook again, where the company continues its attempts to take over the known digital universe before Google does.

Currently, the social networking giant notes “200 million people around the world are now actively using Facebook from a phone, more than triple the number just one year ago.”

Thus, some new tries of a lot of stuff, such as single sign-on.

Meaning you sign on a Facebook and it signs you on all over the Web (or at least at those in partnership with the company).

Such as at Groupon and Zynga.

This single sign-on stuff has been tried by many before, a kind of Holy Grail of the Web, and where everyone has failed.

But it also the proverbial camel’s nose poking in your digital tent.

As in, the whole Facebook body is surely coming in next.

Facebook’s exec in charge of all this, Eric Tseng, talks about a virtuous circle of single sign-on, happy users and happy developers, sounding as if this is the single biggest problem facing humanity.

A password crisis! Silicon Valley to the rescue!

Perhaps the only issue the now damaged administration of President Barack Obama could actually get some legislation passed on now.

“My fellow Americans, we have too long be stuck in a miasma of forgetting which name of our dog we used for our password plus the number one…”

How much do I want to be at Giants parade right now? Much!

11:02 am: Next, we move onto more ability to show your location to friends on Facebook better and make sense of it by opening location APIs.

More heavy pontificating about what a disaster it is that we cannot properly see where our friends are on Facebook in the real world.

Of course, this leaves out the pertinent point that my “friends” on Facebook are exactly those I do not want to run into at the Starbucks on El Camino Real in Palo Alto, Calif.

Loopt Founder Sam Altman comes up to show off the integration with Facebook Places, where this problem is solved anyway.

“We believe data wants to be unified,” says Altman.

Certainly if you are the Borg, you want it to be unified. Me, not so much.

11:11 am: Now comes the attempted Groupon-killer from Facebook, which is creatively called “Deals.”

This is essentially allowing Facebook Places to locate a person and then merchants to offer deals when a user is nearby via a platform offered by Facebook.

You can do individual deals, such as getting a beer at a bar when you check in. Then, there is a loyalty deal on the phone, taking the place of that dog-eared card you always lose.

And there is the “friend deal.” This is not friends with benefits, sadly.

It means if you check in and bring a lot of folks, one eats free–which sounds just a little naughty.

Also, there is one deal type related to charity.

For the Gap, for example, you get a free jeans if you are among the first 10,000 to check in at a Gap store. There are 500 million Facebook users, so you do the math.

Essentially, it is about getting stuff if you check in, including experiences.

So, just like little white mice in Facebook’s lab, we push the button, we get the cheese. Sigh.

But I wonder if I check in right now, I can be transported to the Giants parade via a time machine. Now that might be something worth handing over my privacy to Facebook.

“The big takeaway for today is that there is obviously a lot of change in the social space,” says Facebook CEO and Co-founder Mark Zuckerberg. “You can rethink any product area and make it be social.”

Indeed, you can. And Facebook obviously is going to be plowing on through a lot of them in order to solidify its stranglehold on the consumer.

11:23 am: Q&A!

The first question is on privacy and third-party developers giving up your location.

Yes, that!

Zuckerberg makes assurances that the current privacy steps now in place are working just fine and also users need to consent.

“The place information about people is not public,” he says.

There is question from Ben Parr of Mashable, about whether there is an iPad app for Facebook coming.

“It’s not mobile…it is a computer,” declares Zuckerberg, dismissing the very good question.

“I think Apple would disagree with you,” countered Parr, correctly.

“Well, sorry,” said Zuckerberg with more than a little bit of snark.

For a second, he sounds just like the guy from the Facebook movie.

But Zuckerberg quickly declares his love of Apple products and apologizes, although he should not have as it was a funny exchange.

A question about single sign-on. Zuckerberg notes that it has been tried, but the experience was bad.

“What we think is going to happen now is that it is so easy when it works, it is a whole different experience,” he said, comparing it to the way YouTube made video uploading on the Web easier.

Zuckerberg’s goal is that all apps become social, which is also a virtuous circle for Facebook, of course.

A question about the deals offer. It seems for Zuckerberg that Facebook is not getting a cut from retailers right now, as Groupon does.

Ruh-roh, Andrew Mason!

Zuckerberg then notes that the Places offering is going well, without giving a lot of specifics.

At the end, PR maven Brandee Barker wraps it up by saying what I have been thinking this entire time:

“Go Giants!”

The folks at Zillow.com have created their first Trick or Treat Housing Index, which draws on the site’s real estate data to determine the top-five neighborhoods in Seattle and Los Angeles to maximize candy intake this Saturday.

How’d they do that? “There is a common belief that wealthy neighborhoods are the Holy Grail for harvesting the most Halloween candy,” blogs Zillow’s Whitney Tyner. But to provide what it calls a more holistic approach, Zillow factored in home values alongside additional data on population density, neighborhood walkability, and local crime. “Based on those variables, this Index represents neighborhoods that will provide the most candy, with the least walking, and minimum safety risks,” she wrote.

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Yesterday, BoomTown opined that Microsoft was nearing a decision on who would become the head of its digital efforts.

And, according to several sources and some puzzling by me–if an agreement can be reached–I think that Microsoft (MSFT) CEO Steve Ballmer’s top choice is former Yahoo tech star Qi Lu.

While this is by no means a done deal, Lu is just the kind of top tech exec that Ballmer and Microsoft would warm to over a more media-centric choice like former Yahoo COO Dan Rosensweig or former AOL head Jon Miller.

Lu was EVP of engineering for the Search and Advertising Technology Group at Yahoo (YHOO), where he ran all development initiatives for its search and monetization platforms. He was at Yahoo for a decade.

If Ballmer manages to pull off the hire of Lu–on the heels of already grabbing another top Yahoo search exec, Sean Suchter, which I reported on yesterday–the aggressive exec could almost be bypassing a Yahoo search partnership he has long sought by sucking the talent right out of the place instead.

Ballmer is like Edward in “Twilight,” attracting top-notch search execs to Microsoft’s Redmond HQ, as if they were geek versions of Bella.

Lu would be a different choice for the post than many had expected, with a much more technical background than one in online media or advertising sales.

But since all of Microsoft’s future rests on winning in the search and search advertising space and trying to catch up with its archrival Google (GOOG) from way back in the race, Lu is also well suited for the position.

If Lu takes the job, he will be the boss of three strong digital execs at Microsoft: Satya Nadella, the SVP who heads engineering for Microsoft’s search, portal and advertising platform group; Yusuf Mehdi, whose online services portfolio includes marketing, online audience business development and product management for MSN and the search properties; and Brian McAndrews, the SVP for the advertiser and publisher solutions group.

Lu is known as as solid manager, but he is also called a very nice man and unusually humble for a tech star by many, which could be a good influence on Microsoft.

Before Yahoo, Lu was on the staff of the IBM Almaden Research Center, and worked at both Carnegie Mellon University and Fudan University in China (he also got degrees from both places).

And, in the kind of cred Microsoft likes, Lu holds 20 U.S. patents.

He left Yahoo after becoming dissatisfied with all the turmoil there, quitting in June, without another job lined up.

Since he left Yahoo, there have been rumors that he might be headed to Microsoft, but not in such a prominent job.

There has also been speculation that Lu would take a position at Facebook or even return to China for a tech job.

The well-respected Lu certainly has a multitude of choices, but the chance to lead money-laden Microsoft’s digital efforts–as it suits up for battle with Google–is compelling.

BoomTown has been poking around to try to figure out who Ballmer would choose for the digital head, ever since the man who used to be in charge, Kevin Johnson, quit in July, after the software giant’s takeover bid to buy Yahoo failed.

Several people close to the situation say Microsoft’s Ballmer has been keeping the deliberations close to the vest–perhaps because so many of those he has targeted have declined to consider the job.

But this week, many sources both inside and outside the company have told me that Ballmer is close to announcing his choice.

Annoyingly, one source has decided to play a digital version of “The Da Vinci Code” with me, dribbling out clues–more technical than media, very well liked in Silicon Valley, humble–about the candidate, which he wanted me to solve as if I were Robert Langdon and on the hunt for the progeny of Jesus.

Well, my solution is in: Microsoft’s most promising digital Holy Grail is Lu.

On a related note, bizarrely, the day after this column broke the story about Lu’s leaving Yahoo, I caught him by accident in the background of a video I was doing at a Harvard Business School event honoring Facebook’s Mark Zuckerberg.

You can see him at 4:14 minutes in the video, laughing at me, as I bother Greylock Partners VC David Sze and make a bad pun related to former Yahoo exec Jeff Weiner’s departure from Yahoo.

Here’s that video:

Please see this disclosure related to me and Google.