Also, (quite possibly) George Lucas makes a cameo in Episode III.
Some behind the scenes stuff with vader:
picture 1
picture 2
Also, I'm not sure I remember the following in the movie(Warning some really huge image links):
Grevious picture
Security hologram
Security hologram continued
Security hologram continued 2
Security hologram (smaller picture)
Security hologram (smaller picture) continued
Plus some more images:
http://chinese-starwars.com/chineseforum/upload_images/zz218.jpg
http://img7.exs.cx/img7/4377/alderaannew39je.jpg
http://img7.exs.cx/img7/4377/alderaannew39je.jpg
A lot of shots put into one huge image
http://img188.exs.cx/img188/4084/00rp3tr.jpg
http://img188.exs.cx/img188/4576/183uf4jf.jpg
http://img188.exs.cx/img188/6060/18b3nf8wp.jpg
Clones fighting
Script
Huge image of the Yoda fight
Huge image of Siddious
Really huge image of the fight between Obi-wan and, Anakin
Really huge image of a cut scene
Really huge image of Anakin kneeling
Really huge image of a behind the scenes thing
Really huge image of Anakin and, Palpatine
Really huge image of Anakin and, Padme
Yoda
Really huge image of Padme and, Obiwan
Really huge image of Padme
Really huge image of Padme's hands
Yoda image 2
Padme and Anakin
Duel image 1
Duel image 2
Duel image 3
Duel image 4
Duel image 5
Behind the scenes duel(big image)
Palpatine
Clone
Vader
Yoda image 3
Yoda image 4
Yoda image 5
http://img233.exs.cx/img233/5651/screenplaypage050image00020qx.jpg
Padme smiling
Chewbacca
http://img141.exs.cx/img141/4881/zzz5pq.jpg
http://img70.exs.cx/img70/7167/screenplaypage023image00016ax.jpg
http://img141.exs.cx/img141/5332/zzzz1fw.jpg
R2
Palpatine