One thing of note in this movie: real life boxer, Paulo Roberto play himself. In the book Salander has a connection to the Swedish Welterweight Champion, and in the film Roberto plays himself. It's pretty cool in a Meta kind of way.
If you've enjoyed the books be sure to check out the original Swedish versions of these films before you see any Americanized movie. I promise these movies are very true to the source material. The Girl With the Dragon Tattoo and The Girl Who Played With Fire are both out now on DVD. The third and final film, The Girl Who Kicked The Hornet's Nest starts playing in limited release this Friday.