You could try the JJJ website:
http://www.triplej.abc.net.au/
They have playlists online from all of their programs so you can usually find some good stuff that's not commercial rubbish.
Might want to grab a little proggy called "Netlimiter" with your Shareaza... it let's you limit the uploads so you can get some good DL speeds...
My downloads practically stopped for a while as I had 9-10 fuckers leeching off me at once as you can't "un-share".