Google bought-out the developing team of etherpad
www.etherpad.org to further develop its own googledocs and (interestingly enough) released the "before purchase" code as open source.
I'm currently installing it under a tab, but I believe it would require a better integration in FO to be a real success (access credentials et all)
Interesting features:Open and/or protected documents (perhaps we could use this feature to protect documents on a workspace basis and leave the open for all)
Chat Pad. It seems as in protected documents it is by-invitation-only, which could be a cool feature to have.
DrawbacksInstallation requires a good amount of tweaking on the linux server so perhaps having it as part of FO requires some additional steps/tools
BTW:
I called mine
SharePad ...