I'm still reviewing comments and sending out invites to new followers, sorry you haven't received one yet! We opted for a private beta in short waves so we can learn more about our users and address their early feedback. I wasn't able to find your email so give us a shout if you're still interested. Click the "Contact" link in the footer. Thanks!
The editor itself is completely static HTML and written in CoffeeScript/Spine which gives us a lot of flexibility. We're exploring different opportunities for integration and possibly a downloadable version.
I second this, KC is a great city for startups and very affordable. Lots of motivated people at Startup Weekend and other events... many Ruby and PHP devs, not enough design talent. UMKC is pushing entrepreneurship through their E&I institute and student venture incubators.