PubSub on the edge? Neville Hobson saysPubSub is still in business, which means probably not for long. The blog aggregator has been rumored to be close to closing its doors for a while and these vignettes from Gnomedex add fuel to the fire. This would probably be the first major casualty of competition in the social media industry, though it's far too early to say there's consolidation going on.  ¶ 1:53 PM