AppleScript
Native Half-Star Ratings
This hint at Mac OS X Hints describes a simple terminal defaults command that allows iTunes to accept half-star ratings by drag or inter-star-clicking.
UPDATED: Add from eMusic Downloads Folder v1.1
Add from eMusic Downloads Folder v1.1 (like Add from Amazon MP3 Folder) will display the Album folders in your designated eMusic downloads folder so you can select which of them to add to iTunes. Optionally, if you allow iTunes to "Copy files to iTunes Music folder when adding to library", you can choose to move the original folder and files out of the eMusic download folder and to the Trash. Latest version runs as application to avoid a potential startup error.
UPDATED: Add from Amazon MP3 Folder v1.1
Add from Amazon MP3 Folder v1.1 will display the Album folders in your designated "Amazon MP3" downloads folder so you can select which of them to add to iTunes. Optionally, if you allow iTunes to "Copy files to iTunes Music folder when adding to library", you can choose to move the original folder and files out of the "Amazon MP3" download folder and to the Trash. Saves a few keystrokes. This newest version runs as an application since the compiled version would often generate an error at startup.
Although the Amazon MP3 Downloader application has a preference to add downloaded purchases to iTunes, I could never get it to work.
NEW: Search Amazon UK MP3
Search Amazon UK MP3 uses terms from the selected iTunes track as the basis for a search of the Amazon UK's MP3 site.
NEW: Reset Tracks Start-Stop
Reset Tracks Start-Stop will reset the Start and (optionally) the Stop Time of the selected tracks--or all the tracks of the selected playlist--to "0:00" and (optionally) their entire duration, respectively. (Erg, that could have been written better.)
UPDATED: Reset Bookmarks to Start v2.0
(Formerly "Reset Bookmarks".) Reset Bookmarks to Start will reset the bookmark of each selected track to its Start Time, effectively clearing the bookmark from its position later in the track. Tracks which have been set to "remember playback position" or which are "M4B" types will have a bookmark position.
UPDATED: Gather Up the One-Hits v2.2
Gather Up the One-Hits had a persistent problem for some users whereby only a single track would be copied to the "One Hits" playlist. I believe I have fixed the problem, albeit at a cost of some speed; but it should only take a few seconds rather than a few moments to run.
Another Reprieve
Dan Frakes emailed me with a vote for maintaining Set Video Kind of Selected:
"One that I'd like to see kept alive, so to speak, in some
fashion is Set Video Kind of Selected. Although iTunes 8 does let you
bulk-edit many of these fields, Set Video Kind of Selected has one unique feature that's very
useful: sequential episode numbering."
I had forgotten about that feature. Make Video Tags also has sequential track, episode ID, and episode numbering.
Genius 4010 Error
This Apple forums discussion post describes an error that many iTunes 8 users are getting:
"iTunes 8.0 gathers data about my music library well enough and sends it to Apple too; but then 10-15 seconds into 'processing' by Apple, iTunes stops and reports that 'Genius results can't be updated right now. An unknown error occurred (4010)'. I thought it might be overloaded servers and tried several more times in the hope of squeezing my request in between those of everyone else; but that didn't work; plus if it were a server issue I'd expect to see postings here from others with the same problems, and I'm not."
Several posters have tried removing dead tracks--tracks whose files cannot be located as designated with the encircled exclamation point--from the library using the script Super Remove Dead Tracks and trying again, and although this didn't work for everybody, several posters did get things working correctly afterwards.