Thanks to Greg’s most recent podcast, I learned about the existence of MusicBrainz. Essentially its an autotagging program for your mp3s! I’d been halfheartedly looking for such a program for a couple years now. It searches a collaboratively maintained database of ID3 tag info and picks the best match whenever possible. Sometimes you have to pick one from a list when the software can’t quite narrow it down.
While the program did crash on me quite a few times (until I learned not to tag songs while it was still searching for matches on other files), overall I liked it. I tagged my more than 1,000 files in just a couple hours of on and off effort! It’d be even simpler tagging a few files at a time as I find them.
Just wanted to make people aware.