Hmm… there are some perl daap clients, so one could probably script something together. I don’t know any pretty front ends that are already done for daap.
If you were particularly *bored* though, you could look toward scripting together a myth or freevo plugin.
If you didn’t use mt-daapd, you could probably always nfs mount the music dir and use something like a fb port of gtk to run full-screen framebuffer version of a gtk player. Or xmms2 — there are about a kazillian xmms2 clients — you could use one of those.
I might lean toward ditching mt-daapd and trying to find a framebuffer mp3 player. (did I just say that???)