Today i found an excellent CMS based upon RubyOnRails, It’s radiant. I installed it on my ubuntu 7.10 box successfully. It was really great experience for me. I am learning ruby yet but would like to contribute for radiant development soon. Anyway will let you know when i’ll be able to release some thing useful in the favour of radiant. I would like to assist if you have any issue with radiant installation. I may help you.