Nope. But it sure is fun to think about. This is an interesting exercise in information quality. This site looks awfully legit., right down to the domain:

www.walken2008.com

The only vaguely humorous thing on the whole site is something you could imagine Walken saying anyway:

If you want to learn how to build a house, build a house. Don't ask anybody, just build a house.

But, like most things that seem a little too crazy to believe, it turns out not to be true:

Christopher Walken's Reps Renounce Candidacy