AY CARAMBA! Facebook founder Mark Zuckerberg will be a guest voice on The Simpsons, according to Vulture. Zuckie has taped an appearance for the upcoming season as himself. In the episode, dubbed "Loan-A Lisa," Lisa decides to help fund Nelson's new bike company. While attending an entrepreneurs convention, the two encounter Zuckerberg, who reminds the kids just how many famous billionaires—including himself—have dropped out of school. Look for the episode to air this fall, just in time for the Oct. 1 release of The Social Network, David Fincher's less than flattering portrayal of Facebook's creator. (7/29a)