Go to any retailer, say Amazon, DDD, or Buy, and type in Jackass, as I have done in the links. Read the specs they provide to see the extras. They also tell the release date, which, by the way, is March 25th.
I have a copy of it and it says it has a ton of extras. There is a sticker on it that says, "Contains 5 hours of bouns material including 27 minutes not shown in theaters". It appears that there are two commentary tracks, MTV's Making Of, Promo spots, 2 music videos and some other stuff.