Rails on Passenger on nginx, omniauth for Twitter authentication, redcarpet for Markdown support.

Thanks for sharing that. I was looking for something like this, keep up the good work :)

Also, would be cool, if you decided at some point to open-source it or unless you went the startup route, and end up monetizing the hell out of it. Then again, making money and open-sourcing are not mutually exclusive, methinks...