I saw the Dark Knight last week and absolutely loved it.
There were a few comical things in the movie but not too much. For instance when the hospital did not completely blow up for the Joker, or when Joker told Maggie Gyllenhall that she had a little fight in her and Joker said he liked that and Batman said "Well, you're going to love me then."
The Dark Knight is definitely a darker Batman movie and is the way that Batman movies should be made.
I did a review of the movie for my crime site.
Dark Knight Review