XBMC Remote Music Interface v0.2 for PSP

Since this site comes up at the top when searching for PSP control I thought I would add mention of a Xbox Media Center Controller for the PSP. It allows you to browse through files and network shares of your xbox media center and send commands to start playback or switch tracks. Another great example of using the PSP for controlling devices over a network.

It was written in Lua and has a pretty slick interface. The latest version also download album art. If you have XBOX media center on your xbox and the ability to run this program on your PSP, then definitely give it a try:
http://dl.qj.net/XBMC-Remote/pg/12/fid/4677/catid/189