JasonN said:

Dear god, WTF is with the color? It's like someone forgot to turn off the 100% Saturation filter in Photoshop...

It's because he was using a camera in pitch darkness pointed at a massive LED screen. The colors were more normal looking as originally shown, let me assure you.

As for CG Yoda... well... I'm just going to come right out and say it:
He looks absolutely terrible to me.

Granted, the EP1 puppet was definitely not an accurate replica of the ESB Yoda, but at least he still looked REAL - he looked like he was a living, breathing creature (another benefit of using real props, George...). This new CG Yoda looks so damn fake to me, I can't f***ing stand it!

The puppet may have been a real object, but something went wrong somewhere. The color was off, the shape was off, the ears were off, the eyes were constantly looking two different directions. Sure the CGI Yoda looks fake, but at least it looks like YODA (and matches the rest of the PT for consistency's sake). Unless someone is planning on making a Yoda puppet that looks like Yoda and replacing every shot in the prequels with it, I think this CGI is the best we're going to get (whenever that may be).

And Octorox is right, Yoda looks downright pissed off in every shot (could the CG artists at least bother to give the character more than one expression?)

Well, it does show that he doesn't like/trust Anakin... And its better than looking at, but not really looking at who he's talking to. ;-)