Nice audio feed, clearly right off the sound board...

http://youtube.com/watch?v=-CfR-KSKBBk

It's a fun variation of "Utne Wire Man" from the stage show. At that point in the show, the audience has "the feeling." Here's another cut from some PBS show. There is a lot of stuff on YouTube from them. This is an interesting mix of stuff from older shows, although the finale looks a lot like the Vegas show.