... Possible referencees to Biden's son and brother's indictment with their lobbying efforts....
That would certainly open the door for Biden to bring up Palin's brother-in-law James Palin, which I don't think she'd want him to do.
I think someone with Palin's past and her family's many secrets would want to keep the debate strictly on policy and readyness to assume the Presidency. As Roger mentioned, she will not debate but recite rote memorizations that her handlers fed to her. I heard on the radio that we should all be on the lookout for any extra large earrings or unusual lumps in her clothings. I would hope that Biden would mention "What a pretty square outline you have on your back tonight, Sarah".