Looking to compare streaming services

MUSIC SMASHER is a pretty cool little web tool developed by Matt Montag that allows you to query the database of popular music services.  Spotify, Rdio, Grooveshark, and Napster are available for smashing.  Rapsidy and Bandcamp may be coming soon.  In any case, the two major providers had most of what I listen to on a regular basis with Spotify nosing out Rdio by hair.