They say that history repeats itself, but that’s so easy to forget. It was only as recently as 2006 that analysts were saying that MySpace was likely worth $15 billion (and I was spoofing that conclusion). And you can go back to older social networks like Friendster or or America Online’s chat rooms… you get the point. So now that Facebook has laid out its plans to go public, with a possible valuation of $100 billion, what do you think “The Social Network” will be worth in five years? $400 billion? $0? Something in between or unmentionable? Vote in our poll and have your say in the comments.