Reading from the Freshmeat record:
Big Medium is a content management system aimed squarely at Web designers who want a CMS that enables extremely flexible designs but remains easy to set up without programming skills. The software does not impose cookie-cutter layouts: If you bring basic to intermediate HTML/CSS know-how, Big Medium can manage just about any design you throw at it. Once the designer configures the templates, he or she can hand the site over to content editors; no technical know-how is required to add or edit pages. Big Medium's friendly, humane interface is easy and non-threatening for CMS newbies.