Charles and the team are doing a fantastic job bringing Ruby to new platforms and enabling the language to flourish in Java-centric organizations.
It's hard to underestimate the significance of their effort in enabling Ruby applications to run anywhere the JVM does, be it App Engine, Android, or inside a major corporation strapped by IT policy. Along with that, they've brought many new ideas to the language, such as single-file deployment to an application server such as Glassfish using Warble - I like capistrano, but that's brilliant. All of this really is a tremendous amount of work.
Glad to see Robuto in action, and excited to think about what might happen on the platform (especially once the "next steps" features he mentions are implemented).
Kudos!