My latest App has just been submitted to Apple for approval. It is something that will appeal to 1% of the population (if that) but it's something that I will find useful - and sometimes that's all the excuse you need.
I developed it primarily to try out the new iAd functionality released in iPhone iOS 4.0, so I wont be charging for the Application.
The theory is you get paid via the (*discrete*) Ad at the bottom of the screen. I'm not expecting to retire on the proceeds, to do that you probably need to develop an App that a lot of people want.
I will announce when it is approved and will post details on the Reefwing Software web site.