An anthropologist at Microsoft points out that when instant messaging and other social networking tools are taken away from people (especially people under the age of 35), productivity drops. That's an indication that social networking is becoming a key problem solving tool, not a "time waster" as many managers seem to believe. Swisscom Innovations anthropologist Stefana Broadbent points out that use of written channels, ranging from IM to text messaging to email is growing, while voice growth has slowed where text communications are possible.
Broadbent theorizes that written channels allow constant interplay and availability without creating an information overload. A person without online social tools averages about 20 contacts with whom they keep in touch. A person with online tools can maintain 70 or more contacts, she notes. She theorizes that IM, for example, is both fast and non-committal, allowing a wider circle of contacts without overload.
That's an interesting perspective as more people start to worry we all are too connected, too much of the time. Broadbent argues that people should not have to unplug. In fact, she rhetorically asks, "why would I want to unplug?"
And she questions the notion that most people actually are overloaded with communication requests. "Most people we interview get five emails a day," says Broadbent. "They are thrilled to get one more friend on Facebook, for example."
Though the common perception is that most people are overloaded with communications, Broadbent says that isn't true. "Not many people are overloaded," she says.
"I'm opposed to the notion of unplugging," Broadbent says. "I don't want to lose my social intelligence network." To Broadbent, "IM is like bringing your dog to work."
Though I don't see lots of evidence that "always connected" behavior is all that important to most people over the age of 40 or so, I am beginning to see how most of the social networking tools can increase knowledge diffusion and make possible a wider degree of casual monitoring of one's environment. I wouldn't say I find it as helpful as RSS. But part of the reason is that most of the people I normally want to interact with do not seem to be heavy social networkers.
..could be that its recent round of layoffs was a prelude to a new round of funding. SunRocket has raised approximately $20 million in additional venture capital from existing investors since early spring, bringing the company's total capital raised to date to about $100 million, the company says. 
