The Supernova 2002 conference seemed to have power strips everywhere, which meant that everyone with a laptop (which was everyone) had them open and on all the time. Because of the Wi-Fi network, everyone was able to work, blog, and surf constantly. On the other hand, we were in a vault, so cell phones barely worked and/or people were good about shutting the ring off (more likely didn't work).
Perhaps have power everywhere is not as good an idea as I thought. People had an entirely different relationship to the speakers, which I'm divided on whether was better or worse or just the same as other events. The small size of the event contributed, plus an array of domain experts and opinionated people in the audience (latter category including myself).