What can we learn from the unstoppable Obama PR machine that just rolled over the country? Never mind the politics: the campaign was the smartest publicity siege that's been seen in a long time. It's particularly worth paying attention to how Obama and his crew of merry techsters paid attention to the net. They  pulled  a bunch of cool tools from their  utility belt: social networking sites, twitter, text messaging, and even virutal advertising in video games.   Find out more about their strategy and how it could work for your non-profit...