In 1966, director François Truffaut adapted the picture to a film; I likewise have very fond memories of watching it on the Sci-Fi Channel. The film was not entirely faithful - it omitted the advanced technology of the book and the ending was much more somber than the novel. Still, I think most people consider it the best film adaptation of Bradbury's work.
In 2009, Fahrenheit 451 became the first of Bradbury's works to be adapted to comics format by publisher Hill & Wang (I've already referred to The Martian Chronicles and Something Wicked This Way Comes, the other two). Adapted by artist Tim Hamilton, it set the series off on a very promising start as Hamilton made a faithful adaptation (including elements such as the robot dogs) but also one with a lot of style. Hamilton made the world of Fahrenheit 451 feel whole and it is the best full-length adaptation of Bradbury's work.
Let's talk about Bradbury again tomorrow, how about it?