Guardian: It is quite utopian, in its way: Boris Johnson and Rosie Boycott, in her first major initiative since being appointed chair of London Food, announced this week that they would aim to have 2,012 new green spaces growing food for Londoners by the 2012 Olympics. They even hoped, in a slightly literal manner, to be able to feed some of the resulting fruit and vegetables to visiting Olympians. There are official allotments, of course, but in London keen gardeners are currently waiting up …