A recent article in www.adweek.com has the value of a fan at 3.60.

"Brands have rushed to Facebook to build fan bases, with some amassing millions of connections. The nagging question has been: What is the monetary value of these fans?"
"Social media specialist Vitrue, which aids brands in building their customer bases on social networks, tried to put a media value on such communities."

"The firm has determined that, on average, a fan base of 1 million translates into at least $3.6 million in equivalent media over a year."
"The company's findings are based on impressions generated in the Facebook news feed, the stream of recent updates from users' networks."

"Vitrue analyzed Facebook data from its clients -- with a combined 41 million fans -- and found that most fans yielded an extra impression. That means a marketer posting twice a day can expect about 60 million impressions per month through the news feed."

I'm wondering what you think a fan is worth?