http://www.yvg.com/itunesartimporter.shtml

I really like using iTunes for Windows, but one feature that I wish it had that other, similar pieces of software have is the option to automatically import album art. With the release of the iTunes COM for Windows SDK, I thought to take matters into my own hands.

With the iTunes SDK and the Amazon.com Web Service I set out to write my first VB.NET application. And while it is apparent that this is a work in progress, it is very usable.

Works pretty good so far. Did a couple of Albums manually and it found the right covers just fine. Currently it's going through my entire collection of songs automatically that I listen to on my IPOD (7500 songs).