Just a random thought while I was playing with my MP3 player and reading various forums. I'm ignorant when it comes to programming and such. Would it be possible to port psgroove to RockBox and the various MP3/MP4 players? Well, it's an idea at least.
Edit: Psgroove on rockbox has been ported to different Ipod versions, a few of the sansa, and now the iriver H10 5/6GB MP3 Players.