There're only two questions that are important for trying to put a price on Facebook:<p><pre><code> 1) How much are Facebook users worth to advertisers (brand and/or CPC) on average and in aggregate?
2) How much is the data Facebook has (the social graph, demographic information) worth to third parties?
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Matt's answer to both, based on his recent two articles, is "right now, not much relative to the internet heavyweights." That actually isn't controversial at all.<p>There's a lot of optimism about Facebook's future, however, that allows people to argue against Matt based on the "just wait until you see what they come up with" line of reasoning.<p>I'd be interested in hearing from both sides about this <i>future</i> Facebook. As in, what facts, specifically, might change about the world that would make Facebook worth $15 billion, and how likely is it that those changes will come about?