Here's another good perspective on ROI and Clearspace from the perspective of Enterprise 2.0:
http://www.socialglass.com/archives/4
Excerpt: "Enterprise 2.0 provides an environment that encourages innovation, facilitates the capture of tacit data, and creates a spirit of collaboration due to the participatory and social nature of said technologies. This allows enterprises to become more efficient due to increased sharing and discovery of knowledge, and helps enterprises maintain competitive advantage by fostering innovation from within."
AJ
Mukund, I definitely agree. I don't think it's going to go away at all. In fact, I'm sure we'll be doing ROI analyses for our customers. My point is that the best ROI artists out there (and there are good ones) will have a hard time quantifying the benefit in any profound way. Still, there are some basic ways to start the process (like time spent researching an answer, number of redundant questions, output before and after, etc.).
I should have been more specific, but what can you expect for a 6am blog :).
The ROI for these technologies indeed does exist, it's just exceedingly difficult to measure because of the broad number of ways they could be utilized. Organizations that deploy blogs, etc and place strict guidelines on how they can be used will never realize the full benefit but might have an easier time measuring direct business value.
Dave
After years of spending IT budgets on non ROI stuff most businesses are conditioned to provide justification as part of their procurement process.
If you want to say the ROI is not yet clear but it exists that's fair and any PR person will accept that.
Realize their audience is asking for this so they are not just asking you because they are bored or they don't get it.