Take a look at Signal Server at http://www.alloysoft.com/ which creates a little web server to remote control iTunes/Windows Media Player/Winamp. Since the iPhone/touch's Safari browser for some reason don't display wap pages ( http://discussions.apple.com/thread.jsp ... ID=1274014 ), the wap interface isn't an alternave for these devices, but functionality like the wap interface for remote manipulation of playlists is what I think of.
Keep ut the good work

Thanks
Inge.