If you feel like learning how to develop your own apps you can do so for free. Go to iTunes on your iPad, click on 'iTunesU' at the bottom right hand side, select 'Universities and Colleges', then scroll to Stanford. Scroll right through the courses and you'll find a 25 lecture course on programming iPad apps. It's free and, by the end of the course, you'll be able to program some simple apps yourself. It's a great resource from one of the best Universities in the world.
Tim