I just thought I'd let people know, that if you've not watched Attack Of The Clones with the audio commentary on, be carefull! George Lucas does comment on a few occasions, about things that will develop and also little things that will happen in Episode III.
Incase you want to skip past the parts that contain spoilers, this is where some of them are:
When you here Qui-Gons voice, shouting Anakin!
When ever Bail Organa is on screen!
There are more, but I can't think where they are.
Just a word of warning!