I just got back from this. I probably didn't catch what happened to Sam's girlfriend if it was mentioned in the storyline.
This was a fantastic film, I thought. Lots of little twists that I didn't see coming this time around. The only bad thing was the fact that the cinema was so packed we where forced to sit up the very front, so the necks a little sore. The 3D was well worth it, if you can live through the first half of the movie without much action. The last half was much worth going to see it in 3D.