Even as social networking darling Facebook prepares a version of its online networking application aimed specifically at enterprise users, legions of security experts are getting behind the idea that the sites represent a serious threat to businesses and other organizations.

From the ability of malware, adware, and spam distributors to use the sites as delivery vehicles for their latest work to the opportunity for cyber-criminals to craft extremely targeted attacks using information garnered from individual profiles posted on pages of Web 2.0 properties, social networking is rapidly becoming a serious pain point, researchers maintain.

Recent examples of malware and adware distribution schemes carried out on the existing services operated by Facebook and MySpace represent merely the tip of the iceberg, they said, with many attackers likely already hard at work creating new methods for duping users of the sites into exposing themselves and the companies that they work for.

"With traditional attacks it was mostly about short-term bets by the attackers, but use of social networking is giving criminals the ability to start running long cons on people through which they can play on people's sympathies to distribute malware or infiltrate an organization to hold data for ransom," said Michael Whitehurst, vice president of global support with Marshal, a maker of Web and e-mail filtering technologies.

"If used correctly social networking can be very effective. Being able to connect with people without going through all the traditional channels has a lot of benefit," he said. "But with the potential for data leakage or targeted attacks, companies are really going to need to police usage and actively scan content coming in and out of these applications."

Other experts pointed to a recent attack carried out over MySpace through which a page on the site was altered to look as if someone visiting the URL was being prompted by their PC to install a Windows update that would instead direct them to a malware-infected Web site once someone clicked on it.