Don't forget all the short, but hilarious appearances Ben Stiller makes in other movies. Such as 'Happy Gilmore' where he is an orderly nurse who is cruel. It's funny, trust me. Although Happy Gilmore is a good movie, that one appearance by Ben Stiller made it all the better.
Other movies are Anchorman. He plays Arturo Mendes. I suggest everyone see Anchorman, if you are a fan of Will Ferrell. You will appreciate it. Here is a taste, and the part with Ben Stiller. Also one of the funniest scenes of the movie.
And don't forget about Night at the Museum, which came out yesterday. Here's a short trailer.