Compared with other forms of human interaction, online social networking is really not all that social.

People visit each other’s MySpace pages and Facebook profiles at various hours of the day, posting messages and sending e-mail back and forth across the digital void. It’s like an endless party where everybody shows up at a different time and slaps a yellow Post-it note on the refrigerator.

Now a new wave of Silicon Valley companies is bringing live socialising back into a medium that has, in the parlance of the technologists, grown overly asynchronous.

Vivaty, a start-up based in Menlo Park, Calif, is creating 3-D virtual chat rooms that people can add to the Web pages and social networking profiles on the sites where they spend most of their Internet time.

The company has been quietly working on its technology for three years and will begin a private test period on Facebook this week in advance of a wider introduction this summer. It is backed by the blue-chip venture capital firms Kleiner, Perkins Caufield & Byers and Mohr Davidow Ventures.

Vivaty turns a flat profile page into a three-dimensional live chat room. Users choose characters to represent themselves from a list of preternaturally handsome avatars — a requirement for any such service — and proceed to one of a dozen environments, like a gothic urban warehouse or seaside villa.

With videogame-like precision, they can then navigate that virtual space, which may feature their Facebook photos hanging from the walls and a YouTube video playing on a widescreen TV. Up to 15 others can choose avatars and enter the same room at the same time for text-based live socialising.

... contd.