Thought you all might like to check out
http://www.plotbot.comIt's a new site for collaborative screen writing. You can start a project and invite only a few friends to join in the writing, or open it to the public for ALL to join. It's still in it's infancy, but works pretty well for now and with a few tweaks it could be an outstanding tool.
I started a project:
http://www.plotbot.com/projects/nights_in_misawa/All are welcome.