I had a chance to attend a local screening of "Fat Kid Rules the World". It's coming to Video on Demand, so that if you don't happen to live in one of the cities where it's getting a longer run, you too can check it out soon. I enjoyed the movie, even though I had not, at the time read the book. (Part way through now.) So, I enjoyed this interview here, with Matthew Lillard about the process of getting the thing made.
The story follows the Troy (who is as the title suggests fat, but as the interview states, this is not a movie about weight so much) who is befriended by Marcus, a homeless punk band high school dropout, and the intersection of their lives. I found the movie really enjoyable and thought it did a great job taking a book told in first person (where so much of the information is transmitted through the internal monologue) and just letting there be moments of silence. This is not to say that there is no dialogue, this is just to say, that sometimes you find with such book to movie transitions they fill in a lot of dialogue to make up for it, and (again, can't say for sure, since I haven't finished the book yet) there were moments where the characters just glanced back and forth and it just worked really well. So, I recommend this movie. (And the book.)