Looks like the game is up. Apple seems to have blocked access.

  This is for developers of any application that needs a stripped down version of the art search.
  The output format is:
      artist|album|playlistID|storeID|artURL

  Search the iTunes Music Store for album art.

  Get "high resolution" (600x600) Album Art from the iTMS

  Contributed by Luke Shingles. Thanks!

  Copy an iTunes Music Store URL in and see the XML output

  Required to decode the iTMS

Contact:
tpemble @ urfbownd d0t n37 (no, I don't normally type like that)

Donate:

If there's anything you can think of for me to give in return for donations, drop me an e-mail and I'll see what I can do.
I'd have no problem with setting you up with some sort of benefit.

Updates:

2005-12-01:
-       Added iTunes Music Store artwork search!

2005-08-10:
- 20:04 Updated the album art. It now supports multiple stores and also
        should be more accurate. Again, e-mail me if you find a bug.
        This should be the final version of the album art retriever.

- 19:30 Added support for different iTunes Stores (Canada, UK, etc)...
        it should work automatically, if it's broken or you want it to
        be manual, send me an e-mail and I'll consider it. Currently,
        it only works in itunes-debug.php, I'll add it to the album art
        later.

        Thanks to Duncan Smith for giving me the tip/helping me figure it out!

2005-08-09:
-       Added this updates section

2005-08-08:
-       Created this page
-       Added the 'Debug' script

  Download the iTunes Music Videos

  Download the iTunes Movie Trailers