>The idea of linking multiple receivers to play the
> same music has been discussed here on the BBS before

I'm not holding my breath. Synchronizing MP3 players is darned near impossible, at least from what I've been able to determine. I suppose, if you get deep enough into the guts of the player, you might be able to do something, but all the plugins I've seen to add this to, say, Winamp, drift apart eventually and never get perfectly synchronized....