Saw it last night. Since it officially got release today I don't think anyone knew it was showing on Thursday night. We went to see it and 15 minutes before it started me and the missus were the only 2 people in the biggest screen in the theater. When it started there was less than 10 people in the room.
The movie has 2 versions, 35mm and 3-D. Yes, 3-D, as in wear stupid glasses so a spear looks like it's going to poke you in the eye. It's also playing on IMAX theaters and IMAX 3-D theaters.
The movie itself followed the story 'guideline' I guess you could say, it had Grendel, Grendel's mom, the Thanes, the Gaets, Hrothgar, and of course Beowulf. Apparently though Grendel has really sensitive ears and when the Thanes party in their hall it gets very loud in his cave. This of course makes him mad and instead of going over and asking them to keep it down he goes over and kills everybody. I thought that part was kinda funny.
The movie was made by animating motion capture of the actors. Meaning, that the actors wore skin tight outfits with colored balls attached and acted out each scene while cameras filmed. The wire frames in the computers were then given shells and animated.
And Angelina Jolie looks good

I think the geek in charge of animating Angelina loved his job.