I was reading Sucks, and many of the posters there picked Lisi as the one being exiled. Other picks were Earl, Rocky, and Yau-man. Fever picked Rocky (duh!). I'm not sure who to believe now.
I think I may go with Lisi, because Sucks had photo-evidence that she's going there (Her background photo in the promo showed her in an area similar to exile island) (She is the only one who brought a canteen to the IC).