Measuring "buzz" power in blogs

(Via IFTF) BlogPulse is a great tool for searching for the popularity of certain words and brands in selected blogs over time, which can serve as a "buzz-meter" tool. I have been having fun searching for some words. See for example the results for copyright, patent and trademark:



Copyright wins by a long shot, but this is hardly surprising as many blogs will have copyright notices. And what about international institutions? Look at the results for WTO, WIPO and WSIS:



I was surprised about the growing popularity of the WSIS. Cause for concern at WIPO?