I finally saw it the other day, and laughed my ass off. Most enjoyable comedy I"ve seen all summer. Oh, and don't forget about Danny McBride the Pyro operator, that guy had a lot of good scenes as well.
Loved the fake trailers, the movie within a movie idea, RDJ, and Tom Cruise. I even enjoyed Matthew Mcougheny(?). This is probably been some of his best work in a long time. I heard that his part was originally made for Owen Wilson, but this was about the same time Wilson was having some personal problems, so MM filled the role. And I think that they were better for it. I think it would have fell flat with Wilson.
And I love how Stiller always manages to throw some kind of Trek refrence in his movies. Hell the name of his production company comes from Return of the Archons
"I don't know what it is, all I know is the sound it makes when someone LIES."