In case anyone here would be interested, I have a Firefly rewrite available at http://git.debian.org/?p=users/jblache/forked-daapd.git
Announcement at http://blog.technologeek.org/2009/06/12/217
Linux-only, some new features, some gone. Like it or hate it, if you happen to like it, I do take patches 🙂 The paint might still be wet in some corners, I’ve not had a lot of time since I completed the initial rewrite but I plan on reviewing the code sometime soon.
You can clone the git tree from git://git.debian.org/users/jblache/forked-daapd.git