Saw Bourne Supremacy this afternoon, and it's just a great action-adventure flick. I would even put it a tad above the first Bourne Identity since I think the acting was better this time around. I'm not going to give an in-depth review or spoilers, but if you like action movies, just go see it.
As a side note, the trailer for National Treasure looked interesting: Nicolas Cage as an Indiana Jones type character hunting down lost treasures. It comes out this Thanksgiving and - from the trailer at least - looks pretty good.