True story.
Anyway, I agree and disagree with just about every competent post here.
I thought this movie was good, but not great. I felt Nolan was going for something epic, something beyond what any action film had done before, but he probably felt the constraints of the genre hemming him in.
I mean some great debates in the film about the role of the hero and the villain in society, but then the BatPod does an about-face against a building? Cheesy stunt.
True, some of the dialogue made me cringe as well.
Contrary to a prior poster, I thought this was the first believable portrayal of Harvey Dent's transformation in to Two-Face, and I've read them all. Having an actor of Eckhart's abilities in that role brought the drama to life in a way that none of the comic portrayal's ever have. And I've never really liked Aaron Eckhart that much.
Ledger was great, blah blah blah. Not Oscar-worthy by a damn sight, but this would certainly have been one of the defining roles of his career. Amazing.
I tried watching Tim Burton's original again recently, and all I can say is that it's near unwatchable anymore. Jack Nicholson owes more to Caesar Romero than any of the comics, and the art direction and cinematography seem amateurish by comparison. Sorry guys, Tim Burton's Batman, once cherished, is dead to me now.
I will say this to wrap things up (finally): I was thinking about the movie all afternoon, then had some weird-ass dreams last night, and I've been thinking about it all morning. Not just the performances or the plot but the concepts and themes explored. That's why I was moved to (finally) create a slashdot account when I saw this topic. Someone felt my need and answered it.
I'll probably go back and see it again soon, but in the meantime, I'll keep an eye out here on the discussion.