Wait, Wait, Who?

Less than 24 hours til Wait Wait, and I'm fairly stumped as to who the guest will be. They don't put it on the show's web site, but it's usually a local person with some national status. They've already had Mike Rowe, Cal Ripken Jr, John Waters, Laura Lippman and last week((!) they had David Simon. I can't imagine Will Smith doing something like this, probably not Jada Pinkett either. Molly thinks perhaps Ray Lewis, and the only other people I can think of would be John Astin or Ace 'Duff' Goldman. And yes, I want to know who'll be there for autograph purposes!

Less worried about the Wait Wait gang themselves, I'm sure there'll be programs or books for purchase & signing.