For an iPhone development class I took in the fall I began developing an iPhone Ampache Client. It was for my final project, so what you have here is the result of me learning objective-c and cocoa touch, and in 10 weeks coming up with this app from scratch.
You can check out a page with all of the details of this application and the source code at http://www.daveeddy.com/iphone. I have released this project under the BSD 3-Clause License in hopes that somebody might pick this project up, as I have ceased development on it after my class was over. If nobody decides to pick it up, I still hope that someone can at least benefit/learn from my code.