Lee, I was thinking the same thing on Tom giving the necklace away to Stephanie. I really don't think the other tribe mates, on such short notice, would have the forethought to vote off any other but Janu. It would be very hard in that group setting, with no time, to gather a group consensus that was so far from what they were leaning towards.
I don't think Tom would have given her the immunity necklace under any circumstances. Tom knows that he is the strongest player in the game and thus is a primary target for getting voted off. He wouldn't risk being voted off just to let Stephenie stay. I would love to see a Tom vs. Stephenie final because they are both strong competitors. I also like Ian, but I fear that he's a little too nice to make it past the final four.
Had Tome done such a stupid thing..his wife would kill him when he got back home..