http://www.last.fm/group/iScrobbler
thats the one you want. it was the original, isproggler is just an offshoot so that indows users can join in on the fun.
isproggler. im part of the group. that should sort you out. there is a problem with it though, you cant listen to music on ipod, then on itunes then sync ipod because the tracks played on the ipod tracks wont scrobble.