This script uses the UNIX qlmanage command to display a Quick Look window of the selected track(s), which can be audio, video, and, perhaps most usefully, PDF, whereby Preview.app is not necessary. Also handy for playing a single track out of playlist context. Need I add that a keyboard shortcut makes this very handy.
Caveats: 1) under Leopard a media file will begin playing immediately, so the script uses a hack to prevent this, 2) under Snow Leopard and better the QL window's title contains "[DEBUG]" which cannot be suppressed, and 3) the QL window can only be dismissed by clicking on its close box.
Capitalize the first letter of each word in selected track names
Displays files in iTunes Media folder not in iTunes track library
Create a text file containing an alphabetical list of chosen tag data
Remove iTunes tracks disassociated from files
Use tag data to formulate new file name for selected tracks' files
Remove selected tracks and Trash or delete their files