Jay Rosen, the NYU prof behind the popular journalism blog PressThink, is launching an experimental wiki site called AssignmentZero. The first group project is a story on how the Internet has made it possible for the audience to be a good source of information and ideas (a phenomenon called “crowdsourcing”). Readers are encouraged to read The Scoop for a status report on the story in progress, and then visit the Assignment Desk to get a chunk of it to work on.