It's time to lead Roger Ebert away from the reviews. Why do I say that? I just went to see "War of the Worlds", which he gave a thumbs down to. Now, it's not great cinema, but it's not awful either - I'd call it a decent summer popcorn kind of flick.
The problem is that Ebert gave Sith a thumbs up. Now, there's no way you could give Sith a thumbs up and give this one (War of the Worlds) a thumbs down. The dialogue in War wasn't completely stilted, and the character motivations made sense. Which is way, way more than I can say for Sith.
Send Roger a baseball cap and put him on the plane to Florida.