How do companies track internal bloggers?

Looking for companies that track anonymous corporate blogging

Missed a chance to go on TV today. MSNBC is doing a spot today on unauthorized company blogging. They called yesterday looking for an expert on how companies track employees who blog anonymously about work. I could have given them some boiler-plate stuff about search engines and consultants, but I didn't have solid up-to-date info. That's why I'm sitting at home with my laptop now instead of having my face pancaked in midtown.

Anyone know the names of companies that specialize in this service? I think it's worth looking into.

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