The next Republican presidential campaign will happen in lots of new places. There will be all the familiar locations we love so much--Iowa, New Hampshire, diners, and Lincoln Day dinners--but this week offered another reminder, as if we needed one, that the race for the 2012 nomination will play out in the virtual world and at hyperspeed. For the next 18 months, there will be stories and controversies and entire news cycles (or mini-cycles) in which the candidates deliver their messages but in which no one is actually seen speaking. The most successful adopter is Sarah Palin on Facebook. She's...