Radiant 0.7.0, code named Intaglio, doesn't mess with this basic approach, but instead focuses on broadening its support for recent versions of Ruby on Rails (Rails 2.1.2 is included and Ruby 1.8.7 is now supported), as well as a number of improvements to performance, the underlying database templates and extension support.
Radiant probably isn't the right solution for an organization looking for a full-featured enterprise content management system, but for a group with basic content management needs that's already comfortable using Ruby on Rails, it may just be the perfect fit - give the live demo a try to find out.
Ruby on Rails has rapidly gained popularity over the past few years as an excellent framework for quickly building slick Web 2.0 sites and applications, and Radiant was clearly built in the same spirit. I'll be watching its progress with interest.