Whew! I basically just heard of this one when I saw it in the rental store. Whip It is the really under-advertised story of a teenage small-town beauty pageant queen who's quest of self-discovery takes her to the roller derby rinks.
Okay, so the plot is basic, but it's solid. While there's a bit of a stretch in the romance scenes, it's a well written down-to-earth story that's supported by an awesome cast with wicked acting. Not to mention some of the most engaging sports scenes I've ever seen. I was literally sitting at the edge of my seat, cheering for the derby teams, and was satisfied with a very realistic ending.
In short, this was good, really good. If you like self-discovery movies, and are looking for something different, this is an excellent choice. I personally think that this one needs to get more attention than it's been getting. Shed a tear, laugh out loud and cheer your heart out.