Do you recall the new Nook that went through the FCC a couple weeks back? I think it might already be on the shelf.
Nookdevs sent out a tweet this evening warning everyone not to hack their Nook. Apparently B&N are shipping a Nook 3G with slightly different hardware. If you try to install the 1.0 firmware you'll brick the Nook.
At this point I don't know that this is the new Nook, but I went through the manual and the FCC ID for the new Nook 3G is listed. Between this and the reported hardware revision I really think it happened.
Shoot. I wanted new hardware.