Equinux has released
CoverScout, a $19.95 utility that enables you to add album cover art to the music in your iTunes library.
The utility performs searches on Amazon, Google and the iTunes Music Store to find possible matches for the music it finds that doesn’t already have album art. You can automatically bulk import missing covers, find rare album covers and more. Music publishers may produce different album cover art for the same release in different countries. CoverScout supports six different countries.
Once CoverScout has found what you’re looking for, you can apply it to your iTunes albums by clicking and dragging. It’ll show you the 10 best suited covers.