I think that the Mole is Paul.
I've discounted Paul as the mole for several reasons but the main one is this.
On the execution quiz for episode 2, question 7. The question is:
7. In "When Pigs Fly" what did the mole do after returning from Pomaire?
A. Catch pigs.
B. Hold one end of the slingshot handle.
C. Load pigs and shoot slingshot.
Answer A would refer to Paul and Liz since they both caught pigs, but the problem is that neither of them WENT TO Pomaire, so neither of them could RETURN from there.
A better option for A would have been "The mole did not go to Pomaire".
I realize this is just an oversight and a goof on the part of the production people, but if Paul were actually the mole they would have paid better attention to that question and had a more appropriate option.
Now something to think about for this week. On the ABC site they have some behind the scenes clips each week. This week one of them is of the production staff trying to get a confessional out of Alex. He is pretty upset and keeps cussing the cameraman, flipping them off, saying the other players are acting like babies, saying he is ready to leave the show, get his cellphone and call someone that gives a $%#&, etc.
Not the exact wording but one of the advertising lines for this week says that the best liked player suddenly becomes the least liked.
We know that CBS plays up evberything that happens on survivor, it's always the most dramatic, most unbelievable, most shocking, best player, etc etc. So I have no trouble whatsoever seeing ABC doing the same thing with "best liked player" and mean Alex even though I don't think that he would actually fit that description. Some of the others do seem to like him since they have shown a clip on the show, and another behind the scenes clip of Alex singing for some of the women and for Paul, so they could refer to him as the best liked.
Since Alex is already highly upset about something and talking about heading home it is very easy for me to see him blow up this week over some incident, piss off the other players, and then tank the test so he can go home. (no spoilers in this thread please thanks, puddin)
Sorry this had to be edited puddin. I didn't realize I had included something from a spoiler. Now if I can just remember what I wrote that was changed.