[bgalbrecht]

So far, nobody's reported a Nook 3G running 1.4.1 firmware, so at the moment this only applies to some Nook WiFis. The Nooks running 1.4.1 firmware have apparently replaced the internal microSD card with a soldered in memory chip, and a new wifi chip.

If your Nook 3G has a serial number starting with 1002, or your Nook WiFi has a serial number starting with 10030, it's the old model, and can be softrooted. The Nook WiFi that's the new model has a serial number starting with 10031, has the 1.4.1 firmware. If you try to download the new model to the 1.0.0 software, which is the first step in softrooting, it will fail, but it will never revert back to the factory settings after 10 reboots, like the original model did.