As far as I can tell this flick is getting NO PUBLICITY WHATSOBLOODYEVER, which is a real shame. But Rob Reiner made a movie of Flipped. I just saw it. It is the best and most accurate of an adaptation of a book I have ever seen in my life. Very few changes, book dialogue is used throughout, plot is 99% the same. The only "major" difference is that the movie is set (mostly) in 1963, but considering how the book was pretty timeless (everybody isn't on the computer 24-7, the most "modern" aspect is that the twins are in a punk band), it really works. It also makes the "box lunch" scene make a lot more sense in context.
So, if it's playing anywhere near you, go see it. It's a sweet movie.