At another forum I visit alot of ppl had this "now playing, last played" thing in their sigs. There is a plug in for Winamp 2 and 3 that generates this and you insert it into your sig. It updates itself automatically with whatever song is playing or last played whenever you post. Kinda neat.

Check it out here, very easy to do.

http://audio-tracker.com/viewtopic.php?t=94