I got a chance to go to the show in Seattle. I participated in the audience's chanting of "Luuuuuuke" when Luke Burbank was introduced or mentioned.
Due to the pending results of the Scottish independence vote as of taping, they recorded two versions of the first Who's Bill This Time? question, one version for each potential outcome in case the vote when the other direction.
There was a lot of jokes and references made during the taping surrounding the understanding of what makes up the United Kingdom, which was started by Paula's mention of not understanding what the United Kingdom is. Some of those jokes and references were cut out in the edited version of the show.
Edited out of the show was a joke that Paula Poundstone made about naming a front-facing fanny pack a "dicky pack".