Web Collaborator - Free web-based collaboration software

"This website creates a new free and easy way to collaborate. Before Web Collaborator, to collaborate on a project meant passing papers back and forth, hours of painstaking corrections, hundreds of wasted pieces of paper, headaches, and plenty of coffee. Web Collaborator coordinates collaborations automatically, keeping backups of every revision ever made to the project, letting you see who made the changes, and allowing you to focus on the work instead of managing the work. Better yet, it is absolutely free for all uses." (Web Collaborator)

I can see lots of uses for this from students doing a joint project, to supervision of dissertations etc, to joint projects with staff in other institutions... Now where can I find a colleague to try it out with?????