I’ve uploaded the changes to the live my2unz.com site and updated the database. All of the original content is still intact. I disabled playlist import, however, since that feature hasn’t been thoroughly tested.
I’m now using standard CCK fields & standard views, along with the content template module for track, album, artist, and playlist forms rather than defining those content types in my iTunes module. I now only use one custom table, which links tracks to a playlist and includes playlist specific info for that track such as rating & play count, since it was easier & cleaner than using one of the node relationship modules.
As soon as I have the iTunes playlist import cleaned up and a fast, clean way to create playlists from scratch without importing, I plan to open the site publicly. The other major feature I plan to add is linking albums & tracks to Amazon & iTunes Music Store, and providing audio for tracks, most likely from last.fm.