I think Butch is playing the game better than anyone at this point. For the last few weeks his name pops up amongst their gossip as someone to vote off but then someone else does something stupid, they all get enraged and forget all about Butch. Next week, there he is again.
Rob's got the gift though.. He's managing to dig some mighty big holes and he climbs right back out of them. I figure next week it'll be Rob, Matt and Butch voting off one of the two girls (I'd guess Heidi but..). Jenna will go right after that.
But when it comes down to the last 3 people I think Matt and Rob will figure out that they won't get the votes against Butch so they'll both be out for him in the hopes of going up against the other for the judges to vote on.
Of course, with this gang anything could happen in just a few minutes and they could all turn their wrath on most anyone. Right now they are like over-tired toddlers. They're all cranky and nothing is making them happy.