Digg loses a third of its visitors in a month: is it deadd?

Back in January 2006 we asked "Will Slashdot be overtaken by Digg?" The idea at the time that the venerable "news for nerds" site could be surpassed in popularity by a two-year-old site didn't seem tenable - until you looked at the numbers. Those showed that Digg was rushing up on Slashdot - and later that year it passed it for pageviews and unique users. But now something's happening at Digg. Dat