I've recently discovered Turntable.fm and here's what I have to say about it:
It's a comparable DJ experience minus actual mixing. Tracklist design is about it but hey IMHO that goes pretty far.
I've started a room, any can DJ within it here is the link:
http://turntable.fm/subaquacious_dubstepdnbetc
You must be my friend on Facebook or have another friend on facebook with Turntable.fm installed because it is in invite only beta!
Add me on facebook
here
Happy turntable.fm-ing!!!