Originally Posted by NiLuJe
It's indeed in the Settings' device info popup, it's also in a bunch of logs (and in the output of one of the *11 commands), and available through the idme tool.
That occurred to me, but since it's not registered I don't think it shows up. At least I couldn't find it in the ALT-411 or ALT-611 output. It's also not going to show up in my router's information since it's a 3G connection. I think that once I register it'll be there. Bit of a catch 22 though.
Anyway, where are the instructions for changing it? In the mean time I can reinstall the old board and see if I can register it. I'm pretty sure the mac address shows up as part of the registration.