http://tags.library.upenn.edu/tag/tagging+collaboration PennTags Feed http://tags.library.upenn.edu/makerecord/url/427 http://tags.library.upenn.edu/makerecord/url/427 This is amazing. Shared document editing that can be uploaded or downloaded and shared in a million ways, including sending right to a blog. Writeboard is totally primitive compared to this, which allows you to tag your documents.<br />