Hey everyone
There is now an ampache application available on 3 of the major smart phones, droid, palm pre and now iphone. Thanks to Bespin Corp there is now iampache for your iphone. iampache is available free from the iphone apps store.
I personally do not have an iphone so I have not had an opportunity to see the app in action, but I hear it works very well.
Ampache's Blog 