How about this: History teachres, students across the world can “adopt” a Facebook account that represents a historical person. These historical persons have friends from their time, reflecting the connections they had. Status updates give historically correct information.
So everyone can become a friend of a historical person, follow their updates, read about their interests etc.
Pros: Educate in a very natural way, raise interest in history.
Cons: Needs fact checking, could be abused to “rewrite” history.
But IMHO it is a wonderful idea to combine history and social networks. What do you think? Worth pursuing? Please comment ….