This is just a quickie... but the two names that are getting thrown about a lot are:
Now, Faye Dunaway, I get. She is a legitimate star, albeit one whose light has dimmed as she has gotten older and she's gotten fewer roles. Christine O'Donnell though to me is a little more of a mystery. Sure, she was the darling of the Tea Party last year, at least until the witch stuff started to come out, but otherwise, she is a failed candidate for senate.
I know which one I'd be more intrigued to see.