Oh, sorry, I figured everyone had been following previous threads.

WinAMP Lyrics is the best plugin I've seen for our purposes. There are others that write to LRC or Lyrics3 specs, but none have interfaces that I like. It's a WinAMP 2.x plugin. I haven't seen any Winamp3 components that do the job, and Winamp3 is slow enough on my system that I didn't look very hard.

Incidentally I wrote the author of Winamp Lyrics asking if he would be willing to publish/share his source, but I'm not holding my breath on a positive response.