OK!
I managed to figure out what was going on with mt-daapd on my server and corrected it quite easily.
I was scrutinizing my process list when I noticed that not only the typical avahi daemons were running but zeroconf was running in there as well! I really have no idea how that slipped in there without me knowing.
I went and checked synaptic and sure enough the package was installed… I removed it, and started up mt-daapd (I had reinstalled the stable release) and the SB connected to it right away.
Add this one to the FAQ, please!!!