Free (well, advertising sponsored - so a bargain in me book) streamed
music is currently blasting through my HiFi rather nicely at the moment,
via some S/PDIF trickery and an outboard DAC - not that that is really
necessary.

I'm using both We7 and Spotify, and noticing better playback quality of
We7 (Mp3 192kbps) compared with Spotify (Ogg Vorbis q5 approc 160kbps).

OK, it's not CD - but for having a rummage around (and finding new
artists for future purchasing) it's ideal...

http://www.we7.com (flash based)
http://www.spotify.com (windows/mac P2P application)

--
Adrian C