Whereyouare ( http://whereyouare.org ) is an experiment in the collective documentation of neighborhoods. It harnesses the power of folksonomy tags from a range of sites that host and organize content of different kinds (flickr for photos, vimeo for video, delicious for links, etc.). To contribute, you simply tag your content with a tag that is unique to your neighborhood and the project, and everyone's material is brought together on whereyouare.org.