Well, there is The DJ (http://www.thedj.com), a little application that 
sits on top of Real Player that broadcasts all sorts of music 
(commercial free, I might add).  The quality is pretty good and they 
even have channels of D 'n' B, Jungle, Techno, and House.
Also, at NetRadio Network (http://www.netradio.com) there is a good 
selection of acid jazz, techo, house, etc. to listen to music on-line. 
Again, the Real Player is needed, but the quality is good, not to 
mention they sometimes have dj's spinning live.
As I find more I'll post 'em.
Happy listenin'
- Lenny
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