I bought some chicken breasts, pork chops, frozen veggies, frozen fruits, egg whites, soy nuts, etc. I am going to stick to their meal plan and calorie suggestions. I like to run so I plan on supplementing P90X with running 3 times a week, so I may have to eat more on those days to keep my energy level up. I changed my MFP goals so I will be eating 2800 calories a day, I will see how that goes and I am sure some stuff will have to be tweeked along the way.

Any other vegetarians attempting the diet? It's incredibly difficult to get even 40 percent protein, and the book isn't really that much help (for instance, they have most of the things listed as veggie alternatives either in the dairy or carb section). Also, nuts don't show up on the "allowable foods", but then are on the meal plans. I'm guessing those go in the protein section?
I guess I'll just continue tracking and attempting to reach the goal, but not being too disappointed when I can't. But I think I have figured out the *real* P90X diet--you're so sore you'd rather be hungry than attempt the pain of walking to the kitchen or cafeteria!