[83a]

what do you want to store? who's gonna use it? why not use a wiki?

if it's about collaborative working on a long text: perhaps plain text-files and a version control system like git is the way to go?

if you want to discuss about a medium-length text, you could use a etherpad.

http://etherpad.org/ - example: http://piratenpad.de/p/hackernews