Oh yeah this is going to be great. The Borat trailer is pretty much a rip-off of the U.K. only special called "Best of Borat" although the scene where he kisses his sister was much expanded: "This is my wife, this is my mistress, this is my girlfriend, this is my other girlfriend, this is my sister" Where in each statement his is with a different woman (or young girl in the case of his sister).
UPDATE: So I'm reading through the message board on IMDB and I came across a post [bugmenot registration] from a frat guy who was duped into being in the movie. He wasn't sure if he was in it or not, but then people who have seen the screening chimed in, and oh boy is he in it! Apparently Borat tells them about a game in Khasakstan where they put some cheese up their "khrum" and then let a mouse crawl in, and this guys says he would do it. Too funny... I can't wait for this movie to come out.