From the wonderful recycling centre. I went to the back to check on the new arrivals, and there was the Mac TV, sitting in a box with a bunch of random junk. After freaking out for a moment, I gathered it up and loaded it in my car before getting back to work on some mangled PowerBook G4s that had also come in that day.
The iMac board and other junk (old Ethernet hubs, broken PC laptops and parts, some Pentium servers) were in a pallet outside, just sitting there waiting to be rained on. I don't know what firmware revision it has, and don't have any Mezzanine devices besides; it's more just in case my old Bondi decides to fry in the future.
I also picked up a couple of beige G3 motherboards with the 83MHz-rated system controllers, as well, so I'll be putting those to good use in the future.