Eva's definitely attractive and well-spoken. She's also a well-known Democrat who openly campaigned for Obama, including being on Bill Maher's show last month. So, if you're talking "replacements for that blonde Republican, Elisabeth," she's not quite it. She's not a comedian like Joy, either.
I did, however, read an interesting article the other day espousing why Brooke Shield's "famous for not be so famous anymore...and being pretty much game for anything," plus her "inside Hollywood scoop"-factor by virtue of the fact that she just knows so many people, would make her an ideal candidate, despite her lack of comedienne-ness. Then again, that's pretty much covered with Whoopi and Sherri.
"There is no use trying," said Alice; "one can't believe impossible things." "I dare say you haven't had the practice," said the Queen. "When I was your age, I always did it for half an hour a day. Why, sometimes I've believed as many as six impossible things before breakfast." --Alice in Wonderland