Blankenship hit me up with an invite to Quora over the weekend and I've slowly been checking it out. At it's core, it's a lot like Yahoo! Answers in that questions are asked of a community, said community answers back with their best insight and others Up Vote certain responses if they agree. It's kind of like Hunch in that there is an unexplainable time wasting aspect of it where you just find yourself trolling for questions that you can answer. You wouldn't think it would be so compelling but it's a worthwhile distraction.