Tropic Thunder - I actually liked this one quite a bit. I'm not a big Ben Stiller fan, and he does his usual routine in this movie, but the rest of the characters and the situation as a whole I just found hilarious. Definitely a movie where you have to turn your brain off, but if you can suspend your disbelief just enough and enjoy it for what it is, there's a lot of laughs to be found.
Burn After Reading - definitely a movie that you either "get" or you don't. And even if you "get" it, there's something not quite right. I dunno, it's a funny movie for just the absurdity of it all. Linda Litchky is a very memorable character, and it's interesting to see how these seemingly independent motivations and storylines just crash into each other. I can see why some people wouldn't be too happy with it.