I think I'm going back to see X2 again today since I can't seem to keep my mind on writing HP. Two non-spoilery things:
Yesterday, before the movie started, I could hear these guys a couple rows back discussing all sorts of Mutant Minutiae. And then I heard one of them say, "There's a Matrix sequel?"
I laughed and laughed. Where you been, fanboy?
Also, from Ebert's X2 review, where he talks about how the fights are usually between people with similar powers:
What would happen if Pyro and Iceman went head to head? I visualize the two of them in a pool of hot water.