It's been a while since I've able to say that. Not since the first Matrix movie, probably. Anyway, this afternoon I had a great time watching Tropic Thunder. It's rather violent and profane, as you would expect for a movie about making a Vietnam war movie, but very clever at the same time.
The main targets of the satire are method acting and self-absorbed Hollywood actors. However the film makes jokes at the expense of many other groups: sentimental environmentalists, heroin users, troubled war veterans, cute children, black rappers, white people imitating black people, Australians, even Jews. What impressed me was that the humour worked without being cruel, and it did illuminate some of the stereotypes underlying Hollywood culture.