I asked this a couple of years ago, and still haven't found a good solution. I can't get on with Media monkey - it refuses to show compilation albums as a single album insisting that they are a separate album for every artist on them. This makes adding album art unfeasible.
Any other suggestions for a simple interfaced music file manager which can get album art of t'net.
Thanks.
EDIT: Never mind for now - I've fixed the problem in Media Monkey