Might as well share this. You know how sometimes you have a good song in a crappy file for a long time and it ends up in a bunch of your playlists? And then you finally get a good version of the file and it's a huge pain in the ass to get it in all the right places? I fixed that for you.

iTunes Body-Snatcher
---
AppleScript for iTunes to automate the copying of playlist info to a new track. GPL. Mac-only.