MC supports pictures of Artists in the Artists view. I don't think those pictures show in any view except a Categories view of Artist. I just tried it with a Categories view of Year and then Artist and it show the Artist pictures.
To get Artist pictures you can do it semi-automatically: Right click on an artist. Cover Art > get artist images from lastfm . That will pull the most popular artist image from Lastfm.com . Those images get stored in your Cover Art directory, in a subdirectory called Artists. You can add a picture there manually for each artist, or change them after they are automatically downloaded.
Brian.
