Very best tools to work with
Before spending the money for an IntelliJ upgrade I revisited Eclipse for Java and Ruby development and the latest code drop for NetBeans 6 (testing) that has good Ruby and Rails support. In the end, I went with a supported commercial product. BTW, I find it interesting that the three most popular Java IDEs now support both Ruby and Ruby on Rails development - that tells you something about the momentum that Ruby has. I enjoy Ruby so much that I have all but stopped using Python.