Rhodes Mobile is an application development framework for creating Smartphone apps using the Ruby programming language. Looks very cool from where I’m sitting, especially since you can compile your application for all major smartphone platforms, including iPhone, Windows Mobile, Android, Symbian from just one set of source code.
Don’t look at it for gaming, though - it’s more of a platform for Enterprise applications. Think of it as a sort of “Ruby on Rails Light”.
One of the interesting bits to iFanatics is that they claim to be compliant with the new development restrictions Apple has imposed (having to build iPhone apps using Xcode), since their framework generates Obective-C code that has to be build and signed inside Xcode.