Wiki based prototypes look promising

When you are documenting/brainstorming "with" the community then it helps to have a tool which provides best practices support -

MASE is a wiki derived from JspWiki. It is a research prototype developed at the University of Calgary. It can be used as typical corporate intranets but its primary target users are software development teams practicing AgileSoftwareDevelopment (i.e. ExtremeProgramming, ScrumProcess, etc.).
More variants on Wiki available here.

Check it out, Wikis will increasingly become a must-have tool for virtual teams.