Show HN: Zen Text - Beautifully simple text authoring

I spent Friday afternoon and a bit of Saturday hacking this together and am wondering if anyone else finds it useful / has any ideas where to take it from here.

For those interested, it is using Heroku for hosting (obviously), Sinatra, MongoHQ, Google OpenID (via ruby omniauth gem), the ruby dropbox gem and Google Web Fonts.

Edit: Sorry, forgot to add it is only really styled for webkit

Nice demo.