Profi Tools at Groundswell
On the Forrester Blog Groundswell I found this interesting Charts showing the US development from 2007 to 2009

Source:
North American Technographics Interactive Marketing Online Survey, II. Q 2009 (US)
North American Technographics Media and Marketing Online Survey, II. Q 2008
North American Technographics Online Survey, II. Q 2007
via / more on Blog Groundswell
Earlier entries:
Groundswell Social Technographics Profil mit 2008er Daten
Forrester: How Technology Buyers Engage With Social Media
The Social Technographics Profile Of Your Existing and Potential Customers