Thing 9:Online Collaboration Tools

I sent an email for permission to edit the Declaration of Independence in both Google Docs and Zoho Writer, but have not received a reply. I looked at both, and think they both look fairly user friendly. I like the feature on Zoho Writer that allows collaborators to provide comments. These tools would be handy for students when working on group projects, and would eliminate the need to print and turn in papers/projects on real paper, is the teacher is able to access the document. These tools would also be handy for job-alike collaboration when creating curricular materials.