You can (legally) download free organ music that this guy plays, records, and uploads. Granted, they don't have every thing you might be looking for. (eg. None of Durufle's Prelude, adagio, and Chorale on Veni Creator Spiritus.) But lot's of Bach, Reger,Elert , Couperin and Clerambault.
Now, I've got an almost new ipod, so let's see if I can get it to work.