I use AlbumArt 1.6; the author has taken his site down now.

The app was here:
http://kempele.fi/~skyostil/projects/albumart/

There is a Tip posted on our local LUG's website here:
http://hllug.org/index.php?topic=LinuxTips

It works in in Ubuntu 7.10 with the change mentioned in the above Tip.