Last Saturday I participated in an ad industry podcast. My first one. How'd it go? You can judge for yourself by clicking here. Bob Knorpp, @thebeancast on Twitter, was kind enough to invite me to join some very smart people on The BeanCast, a weekly, hour-long audio broadcast that brings the brightest minds from the ad business to a virtual round table to discuss current industry trends and news. This week's show featured Bill Green, @mtlb, Dirk Singer, @dirktherabbit and Ian…