Like Nute said: The movies are the only things in the Star Wars universe that can be considered 'canon'. The rest of the expanded universe, even if sponsored by Lucas, is still only fan-fiction, and can be totally disregarded by the creator at any time if he wants.
The only thing worring me about Ep.II at the moment is the actor playing Anakin's somewhat stilted and mechanical performances in the clips I've seen so far.
Everything else looks good.
[This message has been edited by edlib (edited November 30, 2001).]