Not a new idea - but seems like a nice design; shame you don't have a video showing it in action, and I don't see why we need to sign up to try it - maybe move the sign up to later on?
What's wrong with text files + text editor + dropbox?<p>I'm tired of seeing all these "distraction free" writing tools. People have been writing using MS Word for years without any problem.<p>Don't try to find excuses for laziness by blaming the "writing tools", and just get to your writing.<p>All you really need is a text editor, most of them are already much better than you'd need them to be.
What's their business model? Why would I type my thoughts there instead of, say, "google docs." Or putting text files in a dropbox.<p>I like the idea of quiet and uncluttered. But it's hard to trust my writing to some new web app with to viable way of monetizing it.