Web-Based Document Collaboration

The ability to create, edit, share, and allow others to edit a document through a website.

Great way to coordinate with other teachers (meeting agenda, open houses etc).
Could be a great way to work with students (classroom projects...students help create a presentation based on book they've read, cross-classroom sharing).
Could be good for student to student work.
Could be good for event or training planning.
Resumes or online portfolios for students.
Document storage...would be nice to not worry about flash drives.
Google Docs offers full editing tools for word processing, spreadsheets, presentations, and forms but requires that all users have a gmail account. Despite gmail requirement though it is easy to invite others to collaborate. You can export in Microsoft formats.
Writeboard offers a quick easy way to share a word processing document. You create a Writeboard and invite collaborators via email. The email includes the link and the password. Exporting only allows for text file, which means formatting is lost. It includes a comment feature, which is nice if you want to just verify that someone has viewed the document.
Google Docs and Writeboard track versions.
Zoho was mentioned as another option but it was not explored.
All of the above tools are free.

Doc Collaboration