Hence, a good deal of Buchanan's previous lobbying work had focused on burying any legislation that would harm his powerful clients.

Washington residents have been mildly titillated by the case but more than mildly curious about the one obvious question: Who were those powerful clients?

One of advertising's most powerful clients assessed the creativity and effectiveness, or lack thereof, of the campaigns for which he spends $800 million a year.

"I have never had such a powerful, creative client," says Tchoban, who was born and educated in St. Petersburg.

Once Brightkite increases accessibility with more powerful clients, those looking to truly get social with their network will have all the tools they need.

Creative Artists has certainly lost some powerful clients, but they haven't had the large-scale attrition that some people thought would happen.

Users who are looking for an extremely powerful cross-platform client might appreciate Psi.

Mesmero later posed as a psychoanalyst to powerful clients in London.

But they represent two powerful clients competing for the same market - votes in the nation's presidential election.