At first blush, the recent Podcast and New Media Expo held in Ontario, Calif., might have looked a bit frivolous — there was a guy with bright blue hair, a woman in a burlesque getup posing for pictures, and someone in a pickle suit handing out promotional buttons — but doesn’t every trade show have its share of weirdness? Podcasting is anything but a joke to the more than 2,000 who turned out at the 2007 Podcast and New Media Expo. In fact, the show itself is no joke, either. It will move its venue to Las Vegas next year.