Yes, as long as all the albums are named correctly, right click on one track from an album in itunes and press 'get album artwork' and most times it will find it and add it to the rest of the album.
Originally Posted by Adam D: “Yes, as long as all the albums are named correctly,”
Ah, there's the rub! Basically it will work as long as the artists and album names match, but even just a couple of letters out and you have to do it manually.