You can set up PBwiki so that a password is required to view the wiki. You may also want to look into using something like Google Docs or Zoho writer to work on a shared document. I haven’t worked with them much, but you can choose who is allowed to work on the document and can see a history of revisions to the document. When you are done, you can export it as a Word Document, an RTF file, or a PDF. These applications were part of the original Learning 2.0 class, but I took them out to cut back the amount of time the class would take.

Good luck with the grant!
Kathy