I would love it if we had confessionals...I would've made use of it last night watching everyone work on the challenge.

Actually, if anyone wants to keep one in Word or something and post it after the game, I might go ahead and do a host log and do the same.
Re: kidnapping, once somebody is kidnapped, whether they choose to switch tribes or not, they cannot be kidnapped again (unless everyone on the losing tribe already has been). So no, they can't just spy for a round or two and come back. I mean, there's nothing to stop them from continuing to work with their original tribe, but a scheme like that would have to be a very calculated risk.
Anyway, although the challenge is not officially completed, points for all nine puzzles have been awarded and we do have a winner. I'll be posting the solutions and results in a few minutes, and then we'll get a head start on Tribal Council...