I strongly recommend the novel, which is a terrific satire about a perpetually transitory businessman obsessed with collecting a million frequent flyer miles. I liked it better than Kirn's more popular Thumbsucker which was already adapted into a film. The movie could be very funny in the hands of a guy like Reitman -- sharp and insightful. It should be closer in tone to Thank You for Smoking than to Juno.
Reitman has already shifted the project into a higher gear by setting his sights on George Clooney, who's in talks to star as the narcissistic protagonist. While I'm pretty sure the character is quite a bit younger than the actor, Clooney has precisely the effortless comic chops this project needs. His profile won't hurt, either.