I've been emailing the owner of SimpleCircuitBoards today about a possible modification to one of his existing products that would allow the MP3 player to be used. It would be controlled in the same fashion as the timer board I designed earlier this year. I know several people have purchased the players for sound looping. If he can make this mod easily, we may have a source for off-the-shelf boards than can control the player. It may be premature to mention this at this point since he's still thinking it through, but is there any interest in having this capability?