Hello,
if someone need setup own simple version of Question & Answers site
(like stackexchange.com, Quora.com, OSQA, Shapado etc.) and love Ruby on
Rails, I just publish not so old code on GitHub -
GitHub - mateuszdw/qaror: Questions & Answers platform on Rails - stackoverflow clone.
Live Demo here http://qaror.herokuapp.com.
Feel free to check it or/and contribute the project.
Thanks
Mateusz