I think the key to the next movie was near the start. When the one Agent Smith is talking to the other Agent Smith and says something like this:

Agent Smith 1: Everything is going like it did last time
Agent Smith 2: (cracks neck)Not exactly like it did last time.

I'm curious to see which way they go with that though.

Overall, I thought it was pretty good. The highway chase was the best part. The worst part was the fight in the palace. It was done too fast to follow the weapons, ruining much of the effect. I did notice that Neo seemed to be using the Sai's correctly, something that few movies or books do. The ghosts where neat, just enough of a change up to be interesting without breaking the background.

One thing I really liked was that in many ways the end is more open then the end of the first one. The hero's actually have less idea of what they are doing and why then they did at the end of the first one.

Jay