I remembered Reddit from a few years ago when it was an also-ran to Digg when at one time it looked like it was going to overtake the New York Times. Anyway, for interest I just checked out the recent histories of these two venerable internet brands and you can see what I saw. It seems over the past two years Reddit has been quietly (at least as far as I was concerned) well and truly knocked Digg off its perch.
Update: It seems like I'm not alone in my appreciation of the rise of Reddit!
Update: Another way to look at the change of fortunes...
