…you could take some notes about the songs you are listening directly on the last.fm player?
Nothing too fancy. Something similar to the delicious notes would be ok.
By now I’m using a tag (toresearch) for discovered artists, and sometimes I take notes on my helipad, but adding them right on the player would save some work, and definitely add richer information than just tags to help you keep track of good discovered artists, special songs… They shouldn’t be necessarily public (although they could).
Yes, more last.fm. I can’t get it out of my head.