Quora is another site that quietly does the job needed by its users very well. LinkedIn used to have an excellent Q&A section, but since LinkedIn decided to put Q&A under “More” the majority of users do not use it. I checked the other day to see that only 137 questions from LinkedIn’s 200 million members were asked in a 24 hour period. There is also too much gaming and abuse by some of those answering which has lead to many of those better qualified to answer leaving the section, and in some cases the site alone for good.
Well done Quora for creating a great place to find answers.