There's plenty of cool updates to TFN's Episode III Just the Facts news section. New details have emmerged on General Grievous, Anakin and much more. Hit this link to read all of the updates - here's the new stuff from the Grievous page:

Greivous' henchmen are fairly mindless, personality-less droids. -PH

General Grevious' character did not replace what was originally intended for Boba Fett. -PH

General Grievous has a lot more dialogue than Darth Maul did in Ep1. -PH

The weapon used by Grievous' henchmen does not shut off a lightsaber blade, it is basically a quarter staff that deflects a lightsaber. -PH

Grievous has two blasters in addition to his captured lightsabers. -PH

We will see Grievous without the mask (face exposed) sometime during Ep3. -PH