A few things..
Do they REALLY give you a picture... now? I want to know if they have Janice, Scooter, or Dr. Teeth.
Secondly.. do they charge you?
Thirdly, are the Muppeteers trained to sign autographs like the character (i.e Animal's would be splatterry, or Piggy's would be flowerey?) I'm working on signing autographs like some of my characters (Mighty for example, signs very fun). Or do they sign it of whatever performer plays that character.
Personally, I'd LOVE to meet a Muppet in person. I'd probably be shy, like I was when I saw Joespeh Barbara, Rob Paulsen, and Maurice LaMarche in person (the latter two I have actually met. The former was such a giant in the cartoon industry.. I was so scared. I'd think he'd've sicked Hong Kong Phooey or Captain Caveman on me..)