Links that I find good:
di.fm
ministryofsound
fusionchicago
bpmtv
hybridized
filemp3
mininova
isohunt
Good Software:
Ripcast
Media Player Classic or Winamp
Tunatic
Azureus
Pandora use this to find more music with the same taste
Airmp3 a good search engiene
For Mp3 Search engienes click here
Gnutella networks | any p2p will do ;)
I might explain more about what all these are for... im tired now, I will update with more.