A VC on the virtues of the "lazy web": your social network is smarter than Google

He makes the point that questions pinged to your social circle don't really benefit anyone but you, but I think he misses an important point -- namely, it's your social circle, so there's a high level of trust between members. They will gladly give you free, valuable advice in the expectation that you or somebody else in the circle will at some point repay the favour. Trust is one of the most important elements of everyday social interaction and it's the biggest remaining uncracked nut in social networking.