使用什么基于Ruby的移动跨平台解决方案?

I'm looking at ways to use Ruby for mobile cross-platform development. We need support for at least Android en iOS, with Windows Phone and Blackberry support as nice to have. It'll be an app that will end up in the app stores for the general public, so it's not an enterprisey in-house only thing. So far I've found:I'm looking at ways to use Ruby for mobile cros