The Facebook Application Long tail is shown
here, from O'Reilly.
I'm sure you've spotted the problem for the facebook developer community....as one of the
commentators on O'Reilly noted.
The only way someone could, in theory, make money by not being in "fat head" would be roll up a significant number of small facebook apps in order to aggregate enough of an audience to make it popular. I believe in terms of creating a network, this is what the Facebook Ad apps are trying to do.
However, I think the whole thing is clearly a losing proposition for developers. There is only one party that will actually succeed from Facebook as a business in any real way, and that's Facebook.
And eyeballing it, I'd guess that nearly all those top ones got there pre Facebook stopping spam-mailing (sorry, viral marketing)
Hmmm...wonder how this will impact all those
Facebook Funds?