I don’t know about the States, but the dominant classical CD label in England is “Naxos,”:http://www.naxos.com/mainsite/default.asp who more or less invented the paperback CD here — costs £5.00 and made by Lithuanians. I bought quite a lot of them when I was trying to educate myself, but later decided they weren’t often good value for money. None the less, they have been a huge and deserved success, and have probably done a lot to force other labels to bring out their paperback lines (Sony Classics, and so on).
This morning it was announced that the whole Naxos catalogue is available through “Emusic.”:http://www.emusic.com this matters not just because it’s downloadable, but because they are actually selling the music. Though you pay by subscription, which gives a fixed number of downloads a month, the music comes in high-quality MP3, without DRM; once you have it you may store it as you like, legally and technologically.
Mind you, if you’re just looking for a bit of Schumann, stream “this.”:http://magnatune.com/artists/albums/mccawley-schumann2/hifi.m3u