I just came came here by accidence and remembered I have an old login here.
Ron, you are clearly wrong on this matter. MPD does NOT server coverart. You need to configure a http server to do that.
The next easiest would be to install ruby and gem, then install ruby-audioinfo.
Apt-get install ruby gem
gem install gem install ruby-audioinfo
Download this script
http://hpcgi3.nifty.com/yo_kubota/downlog.cgi?data/mpodjacket.tgz, untar it to /usr/bin .
Then just write "mpodjacket.rb -r /home/mpd -m /Music -p 8888 -s Folder.jpg" (if /home/mpd/Music is your music folder)
This method can extract embedded cover art.
If you just need to serve Folder.jpg you can just use the already installed lighttp as it is only used for the incredibly useless Voyage webgui.
edit the /etc/lighttp/lighttd.conf as follows (or make a backup first if you want)
type vi /etc/lighttpd/lighttpd.conf (or apt-get install nano, if you are not used to vi)
Change these lines:
server.document-root = "/var/www" <-- change this to your music folder
My music is at "/Music" so I use [server.document-root = "/Music"]
server.dir-listing = "enable" <--change this to disable if you dont want directory browsing
lighttpd will follow symlinks as standard. You might want to comment out all the lines concerning php at the end of the config-file but you can also just leave it be.
Then just write
/etc/init.d/lighttp stop
/etc/init.d/lighttp start
or just reboot
Remember that there is a difference between Folder.jpg and folder.jpg. mPod will fetch either one, but not both.