And if you guessed it was from all of those people putting up their unwanted presents on eBay, you are completely, 100 percent…wrong. Dec. 25 and 26 saw record mobile traffic to Zillow.

In general, mobile traffic to the real-estate site surges whenever people are out of the office. During the average weekday, Zillow says that only about 15 percent of traffic comes from mobile devices. On a typical weekend, anywhere from one-fifth to one quarter of Zillow’s traffic is from phones. On Thanksgiving, that figure reached 30 percent, while Christmas Day saw a record number of visits to the mobile site, with phones accounting for a third of all Zillow’s traffic.

As for eBay, it said Dec. 12 was its busiest mobile sales day ever, with the number of transactions well more than double that of the busiest day of 2009. That marked two years in a row that the second Sunday in December was the busiest eBay shopping day.

For those who want to slice eBay’s mobile business in all sorts of ways, the company has posted an interactive graphic with all sorts of fun facts. For instance, auto parts represented 15 percent of mobile sales in Germany as compared with only 8 percent in the U.S.

Presenting at the webinar will be Myspace CEO Mike Jones–-who has been pitching Myspace as “a social entertainment destination” rather than a social network–-and Dan Rose, VP of Partnerships and Platform Marketing for Facebook.

Here are my live notes:

Mike Jones says the launch today is called “Mashup with Facebook.” Users can share a stream of entertainment content with one-click setup.

One million users engaged so far with Myspace Facebook through initial partnership of “Sync with Facebook,” which was launched in August to push user streams on Myspace to Facebook. Adding Facebook Like button soon.

Image to the right is Myspace’s special branding of its integration with Facebook Connect: “Mashup.”

Dan Rose: Every day 10,000 Web sites integrate with Facebook Connect, but this one is special. Adding users into the experience works when it’s naturally social in the offline world, and entertainment is social.

Rose says Facebook users will be able to take their Likes to Facebook as well.

Jones says this feature will be rolling out to the full Myspace audience today.

Rose says, “There’s nothing different about this implementation than any other Facebook Connect implementation or any other implementation of the Facebook Like button across the Web.”

Jones says, “We think this is a complementary offering to Facebook and other social platforms.”

Rose says it’s good that Myspace is focused on entertainment and Facebook is focused on being a social platform, and those things are different.

In the last couple of days (since the Facebook Connect option was rolled out on the Myspace signup page), metrics for people connecting with Facebook look good, says Jones, but he doesn’t specify. (He keeps saying things are good questions, and then not really answering them.)

There is no financial component to the relationship.

And that’s it! Pretty mellow.

Please see the disclosure about Facebook in my ethics statement.

I pretty much don’t have to say any more than this: A mashup of a big shark and a giant octopus, which is also really pissed off.

Here’s the ridonkulous trailer for the upcoming movie, “Sharktopus,” a Roger Corman-produced movie that is coming out on the Syfy cable channel and stars scenery-chomping Eric Roberts.

And let me just say–do not miss the bungee jumping nightmare depicted below:

That would be, of course, Yahoo’s (YHOO) Jerry Yang, Microsoft’s (MSFT) Bill Gates and Steve Ballmer and corporate raider Carl Icahn.

Here’s the mashup video, with the original OK Go one–which I never get sick of watching–below it:

One of my favorite things about the Web is how quickly and effectively you can take media and mash it up into all sorts of new forms.

Case in point, this comparison of scenes from a trailer from the latest Batman movie, “The Dark Knight” and that of 1989′s original “Batman.”

Incredibly, many of the scenes are almost exactly alike.

(I had posted some trailers from “The Dark Knight” here, at the time of actor Heath Ledger’s death in January. Ledger stars in the upcoming movie as a very malevolent Joker.)

See the trailer mashup here, which is on CollegeHumor:

In the words of Yul Brynner’s rocking Ramses: So it was mashed up, so it shall be posted.

Do not miss this video, as it is quite perfect: