I signed up for quora as I was having some questions which can only be answered by experts. Quora is good platform for asking question to experts directly.I posted my question and tagged some best viewed authors. Within 5-6 hours, I got good response on my que. and got the ans. for which I was looking. Now I am an Quora addict, I use it daily. The best part is you will come across such question which you even cant think in your rarest dream and it is fun to read answers of such questions like who was the First Customer of Amazon.com?.I am happy using Quora and will continue to use as far as I am having free time.