i saw this movie last night and i cannot recommend it enough! it was hilariously funny and all the actors were perfectly cast. it was a joy to see steve carrell play it "straight" (although his character is gay but not playing one of his goofy characterizations). greg kinnear, toni collette, alan arkin were wonderful but the two children worked their comedic roles simply, without pushing the laughs, just natural, which is definitely not always the way of children actors.
i keep thinking of scenes from the movie today and laughing out loud in the middle of walking down the street - people staring at me, who cares? it's one of the few dvds i'll buy when it comes out.