My App's Pricing plans. 
thibaut_barrere: On freemium: I'd really follow the advice of "It is a numbers game, so bust out your Excel spreadsheet" (from http://gigaom.com/2010/03/26/case-studies-in-freemium-pandor...).I would really try to understand how much a freemium user cost in your case, and how many (and which) premium users you would need to cover the free ones.