For specific audiences, using Gists as data storage is really useful. I did the same for my "reverse StackOverflow": http://askedtheinter.net/

Users own all their data, they can revise their answers, and other users can fork them; just like small Git repositories, and just the use-case that gists generally solve. Compare: http://timcameronryan.askedtheinter.net/q/1318314 with https://gist.github.com/1318314