The first episode of 30 Days is still, definately, the best. Spurlock put his on life on the line to make a fantastic 45min documentary on the state of the American working poor.
4 episodes later we have two well off Americans whinging for 30 days about not having any meat or hair products. Spurlock and the gentlemen in the second, third and forth episodes really looked like they were trying to learn something, basically on a sliding scale (anti-age, then muslim, then gay).
Spurlock either needs to put himself back in the game, or find people willing to literally make their life the subject for the 30 days. Otherwise I honestly can't see this being as fantastic as it could for another season.