You don't really have to guess. Last I saw something like 15% of Facebook revenue was Zynga-related. So it's likely they're truly worth a quarter of their curr

You don't really have to guess. Last I saw something like 15% of Facebook revenue was Zynga-related. So it's likely they're truly worth a quarter of their current valuation or so, on the basis of funny t-shirts and social gaming writ large.