Facebook is Worth $116 per User? Online Market Value Per User Infographic
The tech review article also included a nice bit of perspective on these valuations.
"Another reason this metric is useful: it indicates that for all the hype around Facebook and its kin, the situation isn't as hyperbolic as it was in the dot-com boom. Remember Excite, one of the first Web portals? It and its 18 million users were worth as much as $6.7 billion—$372 per user—to the @Home Network in 1999. The next year, Lycos was valued as highly as $12.5 billion, or $431 per user. It might be of little solace that valuations aren't as inflated as they were 12 years ago, but at least today, unlike then, there is a sizable amount of Internet ad revenue to vie for."



