As TechCrunch reported, Google acquired social question and answer site Aardvark ( vark.com ). TechCrunch says the acquisition price was "around $50 million". At Vark.com, you can sign up, specify your location and three required topics of your expertise, to then be able to ask questions and answer questions related to your expertise. The site was co-founded by ex-Google employees and is quite straightforward and easy to use.