Pure awesomeness.
The Colbert Report has a green screen challange where he played around in front of a green screen with a lightsaber a few months back and asked fans to make a clip out of it for a contest. Well he was about to annouce the winner last night and George Lucas ran on set with his last minute enty(not yet on youtube). A scene with new footage by ILM of battle droids and Jar Jar. Lucas even got Ahmed Best to record new Jar Jar dialouge where Jar Jar lightly bashed George Bush. George Lucas even joked about Episode I:
Colbert: Do you like all the movies?
George Lucas: Most of them. Episode I....I'm not so sure about.

He then at the end had a lightsaber duel with Stephen Colbert which IS on youtube: