It was a fun movie. You need to have seen the first movie to get a lot of the plot because there are a lot of characters from the first movie that re-enter the plot at various stages. It won't make a lot of sense what is going on if you don't know the previously existing relationships between the various characters. Mrs. Lime thought it was a bit long (2 1/2 hours is pretty long to be in a movie), but I didn't think it was too bad. Tons of action throughout the movie with some occasional physical humor to crack up the kids.
Next up, we're going to see Superman Returns in the near future. I've heard it's pretty good, so it should be fun.