Trivia: In one of the trivia books about the movie, there is a page where the different beverages sold at Dex's Diner are illustrated. One of the substances is labelled 'Alludium PU-36.' Alludium PU-36 is the 'explosive space modulator' that Marvin the Martian attempted to use to blow up the earth in the Warner Brothers Bugs Bunny cartoon.
Trivia: Jett Lucas (the son of George Lucas) appears as a young Jedi padawan, and Katie Lucas (George's daughter) appears as a twilek in the Coruscant bar.
Trivia: After the fight scene between Obi-Wan and Jango Fett at Kamino, as Jango runs up the walkway into his ship, the door closes from above and knocks Jango in the head as he enters. Deliberately done - a little nod to the Stormtrooper having the same accident in Star Wars. While not all storm troopers are clones, this seems to suggest that a few years down the line at least some are, and have inherited their "father's" occasional clumsiness. Confirmed in the commentary.
Trivia: The vehicle that Anakin steals for the Coruscant chase scene has deer whistles on it, right behind Anakin and Obi-Wan's heads. For those that don't know what deer whistles are, they are small whistles that mount on the bumper of your car and make a high-pitched noise (too high for human ears but perfect for animals) to scare deer off the highways.
Trivia: The tower where Dooku meets Sidious at the end of the movie is obviously incomplete (unfinished parts can be seen). It also looks very much like the Emperor's Citadel, briefly seen in the cutscenes of the Tie Fighter computer game (then completed).
Trivia: Amidala seem to buy her suitcases on earth. I've owned the same kind of suitcase set used in the flick. They're from a company called "Atlantic". The only way they've been modified for the film is the funky padding inside. (00:28:05)
Trivia: In the floating pear scene, we see what type of cutlery they used a long time ago in a galaxy far, far away. It turns out to have been designed by the great Danish designer Arne Jacobsen, who is famous for his egg-shaped chair. But there may be a reason that Lucas used this cutlery - aside from looking futuristic, it is also the cutlery they use in 2001: A Space Odyssey.
Trivia: When Obi-Wan is getting the tour of the cloning facility he looks up to the ceiling and the camera shot switches to show some equipment moving. It seems like a senseless shot that doesn't fit with the rest of the scene. If you look closely you will notice that the piece of equipment is actually the saucer section of a Star Trek starship, possibly Voyager or the Enterprise -E.