I've started a new project using Radiant. After doing a review of other Ruby on Rails-based CMS projects, Radiant is still my first choice.
This project will be a bi-lingual website and the Globalize2 Extension does a brilliant job of meeting this requirement. You can view the screencast below to get a feel for it's functionality.
However the "master" project repository is not compatible with Radiant 0.9.1. You will need to use this repository instead. I'm thankful for GitHub and forking!