It's such a coincidence that my marketing manager and I were talking about these yesterday. We were actually talking about using them for the opposite task (building a cloud based on our marketing materials to see what words we're over-using) - but I love your idea as well.

While I don't think it would be efficient for us to develop this ourselves, I just looked into Wordle (great site), and they have a really simple way to plug in from other sites. I'll have to think about it, but with very little effort at all we could probably provide a button that would bounce the text to their site.

In the mean-time, as a proof of Concept I used our Print Forum feature, and copy/pasted the result to Wordle. The same thing worked with a Survey report, focusing on copy/pasting the Textual elements.

I've attached a picture of a cloud of my demo site's forum. (: