Although Nolan seems to have a propensity for too many speeches (I prefer more subtlety and more concise dialog), I think he could handle most other aspects of a Bond film rather well. The cinematography would probably be brilliant.After having seen "The Dark Knight," I'd like to see Christopher Nolan direct Bond 23. I think that, given the amazing nature of "Knight," he could handle both the action scenes and the dialogue scenes between characters.
However, I worry that he would make it too long. I prefer Bond films to be a bit under two hours, like the early Connery ones, TND, and now QoS. That said, if that was the trade-off for the first Bond film made in IMAX (especially if it was Thunderball-esque), I'd be game.
Personally, I wouldn't care about the length of the film, if Nolan directed. I think that he could make a believable story with realistic dialogue and action. I certainly felt that way after "Dark Knight."
For me, one of the problems with a new director is that they can handle either a dialogue scene, or an action scene. Nolan, I think, is one of the directors who could handle both.