My first question is: "who is this for?"
The interface, and experience look great. But who needs this? Who is pulling out their hair looking for a new hosted publishing platform that they don't control?
Maybe this is a "hair-on-fire" (Patio11) problem for some folks - but I couldn't tell from the blog post.
I think this is a mistake a lot of us make when we're marketing, writing about our products: we go through the features, but don't identify who the product is for.