Using Yahoo! webservices, you can interface your iTunes library to the Yahoo! Music Search and fetch any missing information for your library items. I have a lot of songs with missing tags, such as album or release date. Using Ruby and a simple REST query, combined with an AppleScript, you can use a hot key in Quicksilver to quickly load in of the missing information.
You'll need your own Yahoo! API key from Yahoo Developer. The code is a little long, but you can see the listing on my blog.
[robg adds: I haven't tested this one.]
You'll need your own Yahoo! API key from Yahoo Developer. The code is a little long, but you can see the listing on my blog.
[robg adds: I haven't tested this one.]
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