Some more spoilers from SU:
-Parvati and Amanda having a falling out before the game began.
-4 idols are played, only one by the villains. Apart from Tom's, they are all said to have "paid off" for the players. Tom plays one to get Cirie out, 2 are played when JT goes home, and the fourth one is still up in the air, but it is NOT played by Russell. The general speculation is that Danielle got idoled by Rupert or Colby, but given that they are picked off after her, that wouldn't really constitute "paying off."
-Each time the idol is played, it goes back into the game.
This theory sounds the most feasible to me: at the top 7, the old school cast (Sandra, Rupert, Jerri and Colby) come together as an alliance to take out Danielle. At top 6, Russell and Parvati are on the outs, and one of them idols Rupert. At top 5, Jerri flips back to the villains to take out an old nemesis in Colby. At top 4, Jerri is seen as the biggest jury threat and taken out.
And some more from cuz:
russell tried to play a different game the second time around because he knew after tc in samoa that he had not received a single vote. so he switched it up a little. russell parvati and danielle will face off against boston rob courtney and sandra, coach and jerri will let them duke it out with no interferance. thus staying silent and not interferring. tyson will try to play both sides and will regret it