Mark Zuckerberg's Facebook has officially conquered the U.S. market on vampire throwing and drunk status updating, but what about abroad? What are intoxicated German teens supposed to do? And oppressed Chinese youngsters? Actually, they have their own Facebooks. Except they aren't international spin-offs — they're unsanctioned clones. And they've got lots of cash. Chinese Facebook clone Xiaonei got $430 million in funding earlier this year, and last year Germany's StudiVZ was bought for $120 million. Zuckerberg's unit, of course, sees none of this. And he's challenging them to a game of Scrabulous. [SIA]