for house/electronic/tribal/etc. music, this site is a nice find: http://www.traxsource.com.
on a sort of related note, some random songs i've been listening to:
m'black - "day dream"
code red - "sexy dancer (thommy & spen mix)"
funkerman and fedde le grand present f to the f- wheels in motion - "nervous rewind 2007"
mn2s - "things we used to do (original)"
faithless - "bombs (benny benassi)"
johnny corporate - "sunday shoutin'"
cern - "go fly (kerosine mix)"
armand van helden - "my my my (stonebridge 2006 mix)"
joey mazzola and mike balance - "in a groove"
mike balance - "star trunk funk"
bodyshock - "attack of the bodysnatchers"
cerf, mitiska & jaren & jaren - "light the skies (retrobyte classic electrobounce mix)"
mike foyle presents statica - "for your eyes only"
scott wozniak - "stand up"
stonebridge featuring theresa - "put 'em up (jj club mix)"
my favorite of the bunch is faithless "bombs" with benny benassi. faithless has been a great group that's been putting out terrific music for years. the lyrics and the beat are fantastic.