Hey everybody (Steegy especially),
I stumbled across this guy's site in which he created a perl script for Allmusic to help bring up better matches for Greatest Hits albums. I'm not sure about you guys but I can't tag any Greatest Hits albums from Allmusic. You never are able to get the artist to match. I'm sure we're all suffering from this problem. Unfortunately, I have quite a few Greatest Hits and love AllMusic's tagging capabilities (theme, style, mood, etc.)
I'm not sure where this guy is on his idea (this was back in '05) but it might be something to look into and maybe even contact him about to improve the allmusic script.
He talks about it and gives out the script here:
http://krkeegan.com/archives/24-Allmusi ... Fixer.html
Check it out. It's pretty interesting.