In response to Puzzle Pirates revenue data sharing, I'd like to offer DomainOfHeroes.com revenue stats. I recently gave these stats out to the audience at an IGC Boston talk I gave.
@Joe - I don't want to hijack the comments, but I'll answer briefly. You can email me at aaron@tandemgames.com if the answers aren't what you were looking for. Distribution currently is solely through domainofheroes.com since the game runs without plugins...there isn't an easy way to hand a swf off to ...
I'd also like to assert that games don't have to sell in-game goods in order to be free-to-play / MTG. We sell customizations and convenience features in our online MMO.