picture-541Whodoyouknowat is a social networking service for professionals that allows users to share old and new contact information launching today at DEMOfall 09, the technology conference co-produced by VentureBeat.

When you join, you can see your colleague’s contacts and use that to make introductions. Different levels of membership can give you deeper access to professional contact information. It alerts you if the contact information you have is outdated.

The company says it is slightly different from other professional networking sites like LinkedIn because it focuses on contacts inside the same company. The Dallas, Texas-based company is self-funded.



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