Why Digg should have sold alreadyLast week, Digg CEO Jay Adelson wasted no time debunking rumors that Google, Microsoft and two media companies were bidding $200 million or more to buy the social news site. It's too bad, because last week would have been a good time for Adelson and Digg cofounder Kevin Rose to sell. According to metrics firm Hitwise, traffic Yahoo's Digg competitor, Buzz, sends to news and media sites nearly caught up with the traffic Digg sends in just one month.