Myungwoon go has released an AVI Player for the PSP. There is no sound yet, but it plays AVI files (320x240 video, possibly a few other resolutions too) and uses the RIN file selector. The included sample file is a DivX, however, we haven't tried an XviD yet. According to the author, currently the media engine API is not available, so the player only uses a MIPS CPU fixed point. He is also working to make the porting more efficient and more powerful he stated.