Also saw Catching Fire opening weekend. I thought it was great. I've read the books but it's been awhile so while I know what happens in the 3rd book I don't remember EVERYTHING. From what I remember of Catching Fire though the movie was pretty faithful to the book.
As far as The Hobbit is concerned, I'm a huge fan of the book. I've probably read it 25-30 times in my lifetime (the last being last year). I did like the first movie, the "Riddles in the Dark" scene was absolutely perfect, probably the most faithful chapter adaptation in any of the Hobbit/LOTR movies.
I know there is a lot of controversy about the 3 movies and especially with this one, but all I've heard so far from people who have seen it say it's REALLY good. I'll find out early next Friday morning.