Of course if the player is buffering compressed audio into memory then trying to compress it again will just be a waste of processing power

True, but I get the impression that the player stores a copy of the fid database in memory. If that is correct it is probably at least a couple megs on any decent sized player and ought to compress very well (mostly text) unless it is already in a compressed format. Anyway, getting this to work is probably beyond my skills, but I thought it might interest our resident kernel hackers if they are bored some day.

-Mike