Wow. This movie surprised me. I haven't liked anything Jerry Bruckheimer produced for a while now, and I wasn't a major fan of The Ring, Gore Verbinkski's movie before this, but this turned out to be a very fun, very light-hearted flick. Also a bit bloody for a movie that is based off a Disney attraction. But I encourage it, just for Johnny Depp's Captain Jack Sparrow. He just loves this role, and indulges in it like a fat man with... uh... fattening foods. Orlando Bloom has a lot to learn, but he proved that he HAS learned something from his time on the Lord of The Rings sets (hell, if you're working with Ian McKellen, Christopher Lee and Viggo Mortensen, you better learn something). Geoffery Rush does play a kick-ass bad pirate.
And, oh yeah, Keira Knightley reaffirms her "sexiest tomboy beanpole on the planet" status. She's an ass-kicker in this film.
This film isn't to save the world or anything... it's just a fun romp. I'd suggest seeing it. You'll laugh your ass off, and that's half the point. The other half is great sword battles and an excellent sea-battle between The Black Pearl and the head of the British Fleet.