Highly recommend you get a hold of the book App Savvy - Turning Ideas into Ipad & Iphone Apps Customers Really Want - before you go forward and build an app that there is not a market for. Could save you a lot of time and effort if you are going down the wrong track. Here is the Amazon link to the book: http://www.amazon.com/App-Savvy-Turning-iPhone-Customers/dp/1449389767/ref=sr_1_1?s=books&ie=UTF8&qid=1326436406&sr=1-1

Here is another post I came across today re: the app business http://www.dailytidings.com/apps/pbcs.dll/article?AID=/20120113/LIFE/201130302/-1/NEWSMAP - Not trying to be a wet blanket on this issue. Just trying to give a heads up to newbies of the difficulties involved in launching a successful app. In this post one of the the app developer of a successful app( Alan Oppenheimer - Art Authority App) says: people often ask him whether they should get into the business of making apps. I say, 'Do you want to make money?' If the answer is yes, I tell them they should make apps for someone else. There's a big demand for app programmers. Like in the past, everyone needed a website. It's the same now with apps,

I agree 100%, i'm getting crazy request to develop apps....