I can say that this is one of the most addictive games I ever played. And yeah, I cant wait for it. Also Jeff tweeted about that the game will be a paid-app and "Probably selling thru the various marketplaces...". I hope this includes the official Android Market, too.
I don't think any app can be really, really successful without being on the official store. So paying? No problem. I would pay almost anything for Peggle ! But I'm not going anywhere else.