[stungeye]

A quick look at the MobiRuby example code worries me. It looks like Objective-C, but awkwardly written using Ruby syntax. In other words, it looks more like an Objective-C wrapper, than a Ruby DSL for writing iPhone apps.

However, with plans to port the system to Android, perhaps a unified DSL could be built to target both platforms.

[peppertree]

If you look at MacRuby, it actually takes a very similar approach. You need something like HotCocoa on top to make it more Ruby like.