I just heard from my good pal Ray in California.
He said that Kermit and Piggy were there, along with Brian Henson, and that they announced the passing of Jerry Juhl on Monday night. Brian said he was happy to know that Jim and Jerry were together again.
The audience was led in The Muppet Show Theme Song. He said that Kermit led the Pledge of Allegiance and that was funny, and then from behind a curtain came Miss Piggy. Kermit said, "You weren't supposed to be here!" She said, "There's an audience, Kermie; of COURSE I'm gonna be here!"
A performer was there and sang Rainbow Connection and Kermit joined him.
There were a couple of hundred people there, and afterwards the Post Office folks were stamping the sheet with a Day of Issue stamp, and signing autographs.
(I've verified with the JHC on La Brea a moment ago about Jerry Juhl. Sad.)