For the longest time -- until earlier this week, in fact -- I was convinced that Jason Reitman's next directing project was Diablo Cody's horror flick Jennifer's Body. Maybe that's because at a Team Juno roundtable interview last year, the two of them talked about it like it was their project (which it is, sort of -- Reitman's producing). Anyway, it's actually Karyn "Aeon Flux" Kusama who is directing Cody's follow-up, while Reitman is moving on to helm an adaptation of Walter Kirn's Up in the Air.

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.

Ever since director Jason Reitman knocked one out of the ballpark with Juno, folks have been itching to see what the man takes on next. Yes, he's taken to producing a few things (like the Diablo Cody-penned Jennifer's Body), but what, exactly, will be his next directorial project. Well, according to Latino Review, they've heard from a source that the younger Reitman will direct an adaptation of the novel Up in the Air, written by Thumbsucker author Walter Kirn. Apparently, some digging reveals that Jason's dad Ivan Reitman is already executive producing the film after picking up a script from Sheldon Turner back in 2003.

Recently, Reitman told MTV that he was "writing something" and would "direct it at the end of the year." When pushed to reveal something, anything, Reitman said "it's a comedy and a drama [book adaptation]. Think Thank You For Smoking, but instead of political it's corporate." And if you look at the synopsis for Up in the Air over on Amazon (I've never read the book personally), it fits right into the above description.

Here's a taste: "Officially, Bingham is a management consultant, specializing in the lugubrious field of career transition counseling (i.e., he fires people for a living). But what Kirn's airborne protagonist is really doing is pursuing his own private passion, his great white whale: accumulating one million miles in his frequent-flyer account. As Up in the Air opens, Bingham has set out on a final, epic traveling jag. He intends to visit eight cities in six days, thereby achieving his own vision of Nirvana somewhere over Sioux Falls, South Dakota."

No official word on this one yet, but the pieces definitely seem to be coming together. Anyone read the book? Is it a good fit for Reitman?

UPDATE: LR provides the following update: I just got off the horn with Jason Reitman's publicist. She did in fact confirm that Jason is adapting the book but that no deal is YET in place for him to direct.