T'bone has got some great new pictures of the destroyer droids. Shown are the black, silver, and bronze variations. Worth checking out!
This may or may not be spoiler material, so highlight to read:
One of the earliest rumors we heard about Darth Maul was that, in some scenes, ILM was going to place CG flames around his skull (ala Ghost Rider). We don't know if they will still do it, if they scrapped the idea, or if it was really ever an idea at all. I suppose time will tell.