For two months after he launched digg.com, Kevin Rose didn't need an alarm clock. "By 6 a.m., I was up and on the computer," he recalls. "It was the sheer fear of not knowing what was on my own home page." Here's why: Seasoned editors do not deliberate over Digg's front page. It's strictly a popularity contest. Users post news stories and images—found anywhere from the websites of big newspapers to small blogs—and with the click of a button, other users either "digg" the items (meaning they like