If you're in the mood for some good slapstick, I would recommend this movie. I'm usually kind of elitist in my humor preferences, considering slapstick sub-par....but somehow, Steve Carrell won me over this time. I know, shocking. :)
One warning - there is at least one sight gag (is that what it's called?) that I found distasteful, so...don't say I didn't warn you. But overall I thought the humor tended to be fairly clean and just ridiculously playful.