Website with iPhone apps

http://iphoneapplicationlist.com/

People have already written several programs. How they work can be viewed directly on the site.
There is an RSS reader, an IM client (AIM), a mobile version of YouTube already mentioned on Habré, a search by zip codes (apparently in the US), a program for making a shopping list, an iPhone version of Digg, yahoo news.

So far, quite modestly.