CD-quality net radio is the music of the gods.
Netmusique is the place to go if you're into techno of low or moderate energy. Jazzmusique is the best downtempo stream I've ever heard - stuff like Mark Farina's mixes and Thievery Corporation get played here all the time. Housemusique is for high-energy listeners who realize that 'high-nrg' trancy happy i've-had-too-much-exstacy techno is trash - here are some more serious beats that deserve more playtime. Still a bit mellow in tune but with a lot more adrenaline than Jazzmusique. Mostly unknown artists.
Oh, and broadband's required. If you've got a decent connection, head on over with your copy of Winamp3 and enjoy.