It'd be really nifty if Xfmpc's window title could reflect what is currently playing in MPD. E.g. if Audioslave - Dandelion is playing it could be the window title. It could even steal whatever formatting you've set from the playlist..
Fixed in git 8041e9 and it uses a custom formatting "artisit - title" and backfalls gracefully if one or another is not available.