I'm might be trading someone my copy of DEFCON for a copy of CC, but I was wondering how we'd do it. Would he unregister his key and give it to me, or would we ask for an e-mail change?

Just contact me via PM or e-mail (support licensing.datarealms.com) with the giver's full name, billing e-mail addresss, and key.

You've been doing a lot of necroing, scancode.

I bring back the dead.

He's just that good.

Some of this stuff hasn't been answered at all on the forums though, so it's probably a good idea to resurrect stuff when you're part of the dev team (in this case, Licensing Technician) and you have information on the subject.
...We need stickies with this sort of information, really.