Since everyone seems so curious, I checked my own Email:
MrDayCee received his invite code from me, according to Gmail, "Mon, Nov 8, 2010 at 4:06 PM" Pacific time.
Freakenstein got his one minute earlier, "Mon, Nov 8, 2010 at 4:05 PM"
Their codes were generated by me by hand, and sent just over an hour before I fired up the mailing list software to send anyone else their code. The timestamp on the mailing list software says the official beta invite codes were sent out "2010-11-08 17:03:18" Pacific. To the best of my knowledge, Kirby is one hour ahead of us, so seeing his official beta invite Email at 17:08 (adjusted for one time zone) looks accurate, but wasn't the first to get it.
Now that that's laid to rest, let's get on with the beta discussion, shall we? :o)