sweet… I really wanted to see rhythmbox get daap support. Not surprisingly, the music in my house is most easily accessible via daap. 🙂
I just installed an ubuntu box, so maybe I can track avahi better.
The avahi-core is too big to include in mt-daapd, I think, and perhaps there are enough alternatives now mDNS-wise that it makes sense to drop the included mDNS altogether and just interface with an existing mDNS server — avahi, howl, apple, whatever.