Back in July, I speculated that Accel Partners VC Jim Breyer might use his position on the Facebook board to strongarm startups developing Facebook apps into taking its money. And sure enough, he's setting up a new fund to do exactly that. But he's cleverly cutting in Facebook itself, as well as fellow board member Peter Thiel's Founders Fund. Facebook CEO Mark Zuckerberg announced at TechCrunch40 that his company and its two main backers are forming fbFund, a $10 million pool of money that will invest between $25,000 and $250,000 in Facebook-app startups. As hard to resist as a solo offer from Breyer might be, a check offered by Breyer, Thiel, and Zuckerberg seems irresistible. And more than a little menacing.