Business networking site LinkedIn has reported a 120% rise in revenues between April and June in its first results as a publicly-traded company. Revenues hit $121m (£74m). Net profit rose to $4.5m from $4.3m a year ago. In May, LinkedIn became the first major social networking site to go public, looking to cash in on investor appetite for social media firms. LinkedIn is the only Social (but business focused) site I use, and I think its worth it as long as they don't allow any useless clutter on it. By the way I happen to found Julio's profile on it recently so hmm that makes us at least two people from this site who use LinkedIn.