I participated in the closing panel at Supernova with Mary Hodder and Suw Charman: a chat about the backchannel that was as chaotic as a backchannel. Technical difficulties provided a disarming tension at first and kept us from showing a video Mary made. Here's the posted version, unfortunately the funniest part was edited out for mature audiences. Suw posted her notes here. At one point, I ran through the silliest powerpoint I could come up with.