Locate .itc Artwork files
On the iTunes 7.2 info page, I've added a ham-handed script that will get the path to a selected track's .itc artwork file. It uses the persistent id properties of the current library and selected track to create the filename of the .itc file (eg: 855D16966D2635AE-E345A3A7AC7E50AF.itc), and UNIX find command to locate that file within the ~/Music/iTunes/Album Artwork folder. It then reveals the file in the Finder. Of course, more could be done with it, like converting to PNG or some such, more error checking, and so on. I've just been too busy to do much more with it ;)