Awesome movie. I laughed most of the time. I wouldn't watch it with children or the elderly, but it was thoroughly hilarious. It was almost like a Balls of Fury in that the ensemble added to the funniness, but it was more reliant on plot driven humor than a lot of movies being put out right now.
For those who don't like the "Young and Talentless" crowd, you might like this as it isn't composed of any one named Seth or Jonah, and is not reliant on it's steady flow of quasicelabrities to keep it moving. It helps, and performances by Zach Galifianakis, and Steve Carelll are hysterical.
Here's a link to Galifinakis's site if you haven't seen it.
I liked it!