Yeah, we're wary about people being like "wtf is this?" so we're slowly opening it up. We're too busy working on features to worry about time-consuming things like welcome messages and how-to pages for right now. Soon though. :)

It's drag-and-drop file-sharing, at a glance. It does much more, but that's the basics. It's faster than Dropbox for certain things (though Dropbox will be far more feature-ful).