I'm no fan of surveys, typically. At work, for instance, we seem to be inundated with surveys. Everyone thinks of surveys as the "only way" to measure how well they're doing. The unfortunate part is, no matter how well one expresses one's opinion on a survey, statistically speaking your issues are unlikely to be the ones on which management chooses to focus.
Occasionally, however, I come across a survey that I feel has merit. This one, for instance:
MIT is doing one of those demographic surveys to get a feel for how blogs are utilized and why. I'm all for it. If you're a blogger, make yerself known.