Charles Oliver Nutter is a JRuby developer and JVM advocate, working to further language development on the Java platform. Charles has also experimented with designs for other Ruby-like languages that scratch itches standard Ruby does not. Charles blogs at blog.headius.com.
Jon Dahl is a hacker and entrepreneur who co-founded Slantwise Design in 2003, which became Minnesota's leading Ruby on Rails development shop. He has since moved into the startup world, and is currently co-founder of Zencoder, a Y Combinator-backed startup that builds cloud computing tools for web and mobile video. In between, he blogged at Rail Spikes, received an MA in Theology, and founded Tumblon, a web-based startup for parents of young children.