Can't you get the artwork of stuff in your itunes then connect your ipod and let it sinc the new artwork? Never tired it, as I only have a shuffle these days but in theory it should work.
yeah but I've got thousands of stuff on my ipod that's not on my computer and i'm not going to the effort of sending it round in circles. You can just google the artwork and put it on stuff on the ipod but that's hassle