don't know if this has been running for long but i just found it through some random french guy's journal (big thank you, random french guy!) a couple of minutes ago.
it lets you submit the songs you listen to using www.pandora.com to your last.fm account. i like the concept a lot :)
made myself a The Spinto Band/Voxtrot radio. it rocks.
Saucy Monky, Chin Up Chin Up, No Wait Waitand Buttercup are all likeable bands that i haven't heard of before.