There's an unusual (and unusually entertaining) ad for this summer's comedy-that-can't-get-here-soon-enough, Funny People, on the NBC website. It's positioned as a clip from a hit NBC show called Yo, Teach!, but it's one of those shows-within-a-movie type things, like those trailers from Tropic Thunder. It's not as funny as those trailers from Tropic Thunder (nothing will ever beat Satan's Alley), ...