Well we've finally launched Viviti - It's a web based/hosted CMS system that's component based. Fully themable using normal HTML, and all editable in browser (drag-n-drop to move stuff around, etc.).
As it is now, it supports adding custom blocks (text or html blocks), rss feeds, blogs, and a few other components. It's pretty neat, and as we add more components will become more and more flexible.
Currently it's still in a invite only phase, as we work through some final touches - but we will start sending out invites to people who request a beta key soon.