re: Detailed Data Aside, Executives Back E2.0
To add a bit more data fuel to the survey research fire: In an in depth survey of 120 IT Executives at large companies (average $10B revenue), Nemertes Research reported that "18 percent said their company is using blogs, 32 percent are using wikis, and 23 percent are using RSS."
The story goes on to indicate "some IT executives will consider open source, but many do not think it is enterprise ready and also have concerns about support costs. IT executives surveyed said the ongoing maintenance of open-source applications would be higher than for commercial off-the-shelf products."