A friend of mine write a simple app for mac, called show desktop or something. If he sells it almost nobody buys. If he give it away for free, every day 300 people sign up but he's not making money. The app is simple, it simply display desktop duh.... I think the app needs a few things. 1. User must sign up to facebook. 2. Apps would ocassionally post to facebook when used. User is aware (in front) but doesn't have to keep giving permission. 3. Apps would display ads on lower left screen for 10 seconds. What do you think? I would need a facebook account with tons of friends then. Where can I buy those and how much?