Christina Applegate signs with her own pen, with her bodyguard standing in front of her while she does so. She pretty much signs for everyone, although when I was there on Saturday - people were being extremely rude, shoving and literally bombarding her with things to sign. Also, she only takes pictures with kids, which is understandable.
Denis O'Hare signed for pretty much everyone as well and talked to me for a bit.
And if she'll say, "My darling, I'm yours!" I'll throw away my striped tie and my best pressed tweed, all I really need is the girl...