ust when you think you might have a handle the plethora of websites taking advantage of user-generated content and many-to-many communications, a list like this compendium of Web 2.0 services reminds us that the world is evolving at a remarkable pace. Arranged by category (Audio, Bookmarking, Calendar, Design, Games, Images, Mapping, News, Projects, Search, Tagging, Video, Wikis, and a dozen or so more), the page lists each entry with a short description and a link. Right now it’s a snapshot in time. It will be interesting to see if the authors manage to keep up the list.