Microsoft chairman Bill Gates made an unpublicized stop at Facebook today. A tipster sent this photo of Gates, possibly telling a Native American folk tale he learned in a storytelling workshop. Or just giving a talk about computers. Who knows?

It's an incredible sneak attack, even by Silicon Valley standards: Fed up with the iPhone and immersed in trash talk, Facebook executives have reportedly created a secret bunker from which to develop a shadowy new phone platform.

In the criminal pecking order, "Facebook games burglar" probably comes close to last. But that isn't stopping the Italian authorities from investigating the burglary of a virtual home belonging to a 44-year-old Facebook user living in Sicily.

San Francisco-based "tracking company" RapLeaf probably has an "extraordinarily intimate" dossier about you—one that potentially includes your income range, your politics, and your "interests" in topics like "adult entertainment." And it might all be under your real name.

Earlier this week, we learned of a vulnerability in Facebook's targeted advertising system that could reveal users' sexual orientation to advertisers. It's not just a theoretical concern: A Stanford researcher used targeted ads to determine a user was gay.

Washington's most famously corrupt (former) mega-lobbyist, Jack Abramoff, is gradually re-entering the public following his prison sentence. Last we checked in, he was on work-release at a Baltimore pizza place, and now he's on Facebook. We're still awaiting friendship confirmation.

Choosing a Facebook profile photo is very serious business. It's the visual that will greet high school acquaintances, jealous exes, and your parents' friends when they search you out. The image you project is entirely determined by your photo choice.

Facebook allows users to list which gender of partner they're "interested in." But do you want Facebook's advertisers to know if you're gay? A Microsoft researcher has found a loophole which could secretly reveal a gay user's sexuality to advertisers.

There are lots of somewhat disturbing studies out about children's online presence, and the adult creepiness that inevitably follows. Like this guy, and this guy, and this guy. Are oversharing parents endangering their children? Taiwan's Next Media Animation finds out!

According to the New York Post, three New York City high school teachers were fired for having "inappropriate" Facebook "dealings" with students, including commenting "This is sexy" on a student's photos. Let's turn this into a teachable moment! Teachers: Don't.

Facebook investor Peter Thiel is planning to give college students $100,000 each to drop out and launch startups. The editor of Slate is pretty disgusted with the concept. This idea will destroy "white boys" and "middle class values!"

Mark Zuckerberg's motives are pure, and the Facebook CEO wants you to know it. Despite what you've seen in The Social Network, he's not in it for the girls, or the prestige, or the money. He's in it for love.

According to a new report in The Wall Street Journal, nearly all of the most popular apps on Facebook—including Farmville, Causes, and Quiz Planet—have been sharing users' information with advertising and tracking companies. Here's how to stop them.

Apple CEO Steve Jobs and Facebook CEO Mark Zuckerberg have had a turbulent relationship. One day, Apple is paying Facebook for a fancy "sponsored group." The next, Zuckerberg is trashing the iPhone. Did their recent dinner date smooth things over?

A British nurse named Nicola Sharp was clicking through her friend Michelle's Facebook photos when she came across a picture of Michelle's daughter and noticed a tell-tale sign of cancer. That's right: Wasting time on Facebook saves lives.

Is the Jon Stewart and Stephen Colbert rally in Washington going to be the biggest satirico-political rally ever? So far, Facebook has registered 290,000 'definite' attendees. Impressive! Then again, Facebook is just a website where people lazily click anything.

In The Social Network, Facebook co-founder Eduardo Saverin gets screwed. But Saverin writes, "The true takeaway for me was that entrepreneurship and creativity... are perhaps the most important drivers of business today." His $1.1 billion stake in Facebook probably helps.

The Social Network, still number one at the box office, tells a tale of Facebook's founding that's slanted against the company's founder and CEO, Mark Zuckerberg. But even so, the movie is missing at least one minor scandal.

Gay-rights group GLAAD set up a Facebook page to honor the memory of Tyler Celmenti and other victims of anti-gay bullying — and the page was promptly attacked by legions of anti-gay bullies. Now Facebook is helping fight the bigotry.

Federal agents are infiltrating social networks via sneaky friend requests and monitoring them via a special command center, according to documents obtained by the Electronic Frontier Foundation. Who cares? Well, prospective citizens, for one.