Recently, I had the good fortune to spend three days with 20 other educators just outside of Albany, working in a think tank. Our job was to look at professional learning and collaboration for the member schools of the New York State Association of Independent Schools (NYSAIS). Our inspiration was the book What Would Google Do by Jeff Jarvis.
Taking our lead from Google, we all used typewithme.com (a Google extension) to record our work. Give it a try; it's pretty simple to use.
BTW, we all loved Google's concept of beta testing: put the product out there, let the users work with it, and invite feedback to make it better.