Tiny Piano, my free piano app for iOS, reached 1 million downloads this weekend.

http://itunes.apple.com/app/id477014214

I built it on my own, using the Sparrow framework. I'm happy to answer any questions you all have (e.g., regarding indie iOS development).

Thanks!

Ron

p.s. of course, I'm now getting the "You're submitting too fast. Please slow down. Thanks." error. I'm definitely reading your questions, but I won't be able to answer them until the error goes away. Sorry!