I always thought they dropped the ball on the frist three by only having Carrie Fisher from the cast on the commentary. They should have had Hamil and Ford as well.
That "to-be-determined" music video is probably a new version of 'Battle of the Heros'.
Incidently, Lance Storm gave his two cents on Ep. 3 on his website, and stated that Maul should have stayed around throughout the three movies, instead of killing him off and bringing in Dooku. This has probably been debated already here, but what do you all think? Should Maul have stuck around, or should Dooku been introduced in the first movie, or what?