I don't either - but it sounds like they haven't used one yet from what Jensen said.
Oh, how could I forget this? Somebody asked Jensen if they'd like either Tom Welling or Michael Rosenbaum to be on the show and he said, "funnily enough they were just discussing having Rosenbaum on the show." And then he clarified that this was just talk and Rosenbaum knows nothing about it. And he mentioned how much fun Rosenbaum is on set. For example, generally at blocking the actors just come on set, in whatever - sweats or whatever, and work out their blocking and then go off to makeup. Rosenbaum came on set for blocking with a guitar. He then sang the entire scene while blocking it.
It would be lovely to have MR on SPN!
Another story - possibly from the breakfast or from the Jensen meet and greet. They were talking about what executive producer credits mean when you're an actor. And something came up about a recent (as yet unaired episode) where Jensen read the script and there was a scene where the boys are arguing and he thought that the dialogue as written was all wrong, "too girly" and he said, "I'm going to have to talk about it with Jared when we're getting our makeup done." And the Brit who was there said she just started to laugh. He didn't get it at first. (After all, make up is just part of his job.) And then he realized what he'd said and thought it was funny too.