According to Business Week, this is what the big companies are now doing, ie providing an internal social networking alternative.
By luring employees into a network, companies hope to leverage their skills and contacts. But they also hope that all that collaboration will cut out time that’s now spent mailing documents and e-mailing comments.
A bit optimistic perhaps. Seems questionable whether such homegrown facebook alternatives will actually provide a substitute for the real thing or just an additional channel. And how comprehensive is Sharepoint in any case?