While their use is still largely limited to less-than-critical purposes, online social networking services are becoming more popular each day. Dating, hobby-related hookups, and party announcements are some of the many trivial pursuits people seek on Web sites like Friendster, MySpace, and Tribe.net. But there is growing evidence to support claims that some social networking services (SNS for short) can be a powerful professional ally to businesses — in particular, independent entrepreneurs and smaller companies, for whom each new personal connection is a significant business building block. LinkedIn and ZeroDegrees are two of the more popular services that facilitate business-oriented connections, and some argue these and similar sites are now doing a better job at connectivity than ever before. Remember Metcalfe's Law — coined by the inventor of Ethernet — which states that the power of a network grows in proportion to the square of the number of its nodes? That's a geeky way of saying that networking technologies nobody uses are of limited value. As the popularity of SNS sites grows, so does their value, because a larger number of users mean better odds for productive connections. These tools for networking are going to increasingly become a part of mainstream business and will be used as an important tool to identify and interact with prospects and partners, fueling the business revolution. See Forbes new social network site.