“Is it enough just to be on LinkedIn and Facebook?” “I just got an invite from a friend who’s on Plaxo. What is it and should I join?” “Will I dilute my networking effectiveness if I’m on MySpace, LinkedIn, Facebook and Twitter?” Read “Beware of social networking overload“, By Eve Tahmincioglu.

One company that seems to have absolutely nailed the internal social network is General Electric. As ZDNet blogger Oliver Marks writes, its SupportCentral network boasts 400,000 users in more than 6,000 locations around the world. It supports more than 20 languages, garners more than 25 million hits a day (that’s more than Google and Yahoo combined) and hosts more than 50,000 communities with 100,000 experts who manage information and answer questions.

One of the hot investments for businesses these days is online communities that help customers feel connected to a brand. But most of these efforts produce fancy Web sites that few people ever visit. The problem: Businesses are focusing on the value an online community can provide to themselves, not the community. Read “Why Most Online Communities Fail“.