I started developing apps the first month it was possible. I initially decided to test the waters by cloning apps which were very popular on iPhone and Android.

I spent a month creating clones of Koi Pond, Fart App, Hipstamatic, and acoustic guitar. In something like 9 months I've sold ~1000 apps. I've made about enough money to pay for the phone and for a year of publishing access to the marketplace.

http://www.mobilematiq.com/