turntable.fm has built exactly that and has a very passionate set of early users. Unless you want to start your own startup, you should probably go work for them.
I just found out about turntable.fm
It does some like the same concept. I guess they beat me to the punch.
Do you have any inside contact info for the folks at turntable/stickybits? ;) I tried contacting them on twitter but couldn't find their email addresses