TFN have posted another spoiler ridden report about Yoda's fight scene. Apparently he shows up just after Dooku has bested Obi and Anakin in the Geonosis hangar. His shadow falls onto the wall behind Dooku (ala Harrison Ford as Indy in Marion's bar in that scene from the first Indy movie.) and then he attacks him Jackie Chan style, wizzing round Dooku lightning fast. It's alleged that ILM are thinking this scene too silly ad George is keeping it in.
Me personally, I don't know what to think. Sounds great but also a little too cartoony. I can just see Chris Lee looking perplexed and vexed as a tiny green frog thing flies past his right ear like that scene in Gremlins 2 when he's attacked in the lab. But then, George does like to stick these comedy moments in........