Early today, we asked for ideas of Episode II cameos and hidden images, and after plowing through several hundred responses in the last few hours, we've come up with a short list in these four categories of great ideas. While these are speculative ideas, it sure would be fun to see a few pop up:

Actors/Directors Cameos

Jude Law (Ewan's room-mate at drama school)
Nicolas Cage (He's Francis Ford Coppola's nephew, his cousins Roman and Sofia Coppola have already been in EPI, and Sofia directed Hayden in Virgin Suicides).
Leonardo DiCaprio (as Padme's Ex-boyfriend).
Weird Al Yankovic (as a Jedi who gives advice to Obi-Wan or Anakin)
Jean Reno (co-starred with Natalie Portman in The Professional) as one of her would-be assassins.
Kevin Rubio (creator of Troops)
Martin Hynes (played George Lucas in GLIL) Chow Yun-Fat
Joan Rivers(as a female golden chaperone droid)
Bill Pullman (as Han Solo's father as he played the Han Solo parody in the film).
Mel Brooks
Richard Dreyfus (as R2D2 appeared in Close Encounters of the Third Kind)
Steven Speilberg
Bill Murray (as a lounge singer speaking an alien language)
TFN Webmasters

Senate Chamber Cameos

Elvis Presley
Mars Attacks martians
Mon Calamari, Noghri, more Wookies, and Ithorians.
Coneheads from SNL
Bill Clinton
Klingons

The Jedi Library Hidden Images

Lord of the Rings trilogy
"The Rise and Fall of the Sorcerers of Tund"
Busts of George Lucas, Exar Kun, Jorus C'Boath, Durga the Hutt and Mark Hamill
"Hero With a Thousand Faces" or any other Joseph Campbell's works
"Blue Harvest"
"To Serve Man"
Darth Sidious comes in to find a few books for some light reading.
When he presents his library card at the desk, the Librarian looks at it, then up at Sidious, then back at the card. "Excuse me," she says warily, "but weren't you in here the other day getting out books with Chancellor Palpatine's Library Card? I'm going to have to confiscate this right now."

Nightclub Scene Cameos

Poster for the Max Rebo band
Cliff and Norm from Cheers
A tribble (from Star Trek)
Harrison Ford and Peter Mayhew out of Chewie costume
Grumpy bartender from ANH
Smuggler being harassed by a bounty hunter
Poster for an alien boy band
Deckard from Blade Runner
A young Whuer and Sy Snootles
"Mel's Diner" sign from American Graffitti written in Aurabesh

Part two in the morning!