I've also heard RFJ Jr's name mentioned, but not as frequently.
Someone else brought up the mayor of Buffalo, too. I was all "noooooo!" since, well, he'd do a good job, but he's the first mayor we've had in my lifetime who has made a difference here. we need him more!
RFK Jr. already declined (the Senate). He said he hadn't spoken to his cousin, but she would be "the perfect choice". So he may have been clearing the way for her.
Ted's not for this world much longer (though Lordy he has survived a lot), and I'd be sad to lose what the family represents, nepotism aside. I was very surprised that Caroline took such a prominent (though behind the scenes) role with the Obama campaign, so maybe that and her recent years as family spokeswoman have given her a sense of what being a Senator might entail versus her private life.
There do seem to be one or two other people in New York State who could do a fine job, I must say.