This was posted on another board, and I thought I would share.
According to SurvivorNews we have reports of significant weight loss on 4 players (so far), Deena reported 30 lb loss; Butch reported 31 lb loss, Heidi reported 23 lb loss (I've read that she came home at 86 pounds ) and she evidently lost some hair too (much like Elizabeth in S2) and headshot photos of Rob show a MUCH thinner face than his promo shot not long after returning.
With these reports and the fact that Snewser put them on his site, I've got all four down at least going to the jury and Heidi final 4 at /least/.