I thought you may be interested in this new site, AllRespect.com.
It's a music community for people to find others with the same taste in music (mostly rock/alternative from what I see). You can also create your Music Compatibility Test to add to your LJ for your visitors to check how similar their taste in music is to yours. Check out mine on my journal.
Anyway, the site is still in beta and by invite only. However, they have a couple promotions going on -- one for LJ users (lucky us, eh?):
You can read a bit more about the site (clearer than what I'm explaining) here:
Here's my page if you get bored: