Hackpad is a YC startup that provides this etherpad/wiki concept for public use. (https://hackpad.com/)

My team has replaced our Google Docs and Trello with Hackpad. Creating a pad is quick so you can make throwaway, single purpose pages but it also has decent formatting tools if you decide to complex reference pages. You can also turn items into checklists for quick and easy task managment.

In retrospect, this is really what Google Wave should have been.

great call. Seems like every piece is being shredded to its bones. Ycombinator and pg is really humming the disruptive tune.

I have been looking along the lines, thanks.