Crowd Science is a new tool that allows web publishers to gather demographic data. We're using Crowd Science currently on ReadWriteWeb - you may have already come across a pop-up invite and filled out the survey. If you haven't, that's because it's done randomly. So if you do get the Crowd Science pop-up, we'd love it if you filled in the demographic survey. The data from this survey lets us know more about our readers, which helps guide us in our topic selection and so on. Plus of course it enables us to get sponsors and ads that are highly relevant.