One of my favorite places to go to discover new content management systems that I haven't heard about before is Vimeo. I can almost always find something new there that's been uploaded and today is no exception.
Here's a look at a slick looking CMS called Apostrophe:[[apostrophe]]
From their profile:
Apostrophe™ is a content management system designed for maximum flexibility with a minimal learning curve. The interface is ergonomic, all content-editing is performed in-context. Manage levels of user permission. Organize and integrate photos and videos in the media library. Create complex page hierarchies quickly.
Check it out at http://apostrophenow.com