Worth It? Finding New Ways to Distract Yourself Online - Digits - WSJ

Website discovery engine StumbleUpon might not have as many members as Facebook, but this summer it
surpassed Facebook as the biggest referrer of Web traffic to other
sites, according to StatCounter.So what exactly does StumbleUpon do, and is using it worth it?
StumbleUpon’s main attraction is leading users to websites they might
find interesting and might otherwise never find. It can be addictive, a
kind of procrastinator’s friend and insomniac’s dream site.