IronPython equivalent for OSX?

With [IronPython](http://www.codeplex.com/Wiki/View.aspx?ProjectName=IronPython) out, it is now possible to create Windows applications utilizing the full .NET platform without breaking out of Python. I enjoy programming in Python almost as much as in Ruby, and I’m sure many people will agree that a lot of developers are going to be much happier now that they have the option to write in Python what they couldn’t before.

I was wondering if anything like this exists for OSX. I’m aware of the [RubyCocoa](http://rubycocoa.sourceforge.net/doc/) project, with is an Objective-C bridge to Ruby. This allows you to write Objective-C applications in Ruby, which essentially means it allows you to write native OSX applications. This is not really the same thing as IronPython. We know that Apple is a supporter of dynamic languages. They include Ruby and Python in the current version of OSX, Tiger. They are even including [Ruby on Rails support into the next version of Leopard Server](http://www.apple.com/server/macosx/leopard/more.html).

Some googling digs this up: “support for script-to-framework programming is available, allowing Python and Ruby scripting to access Mac OS X specific APIs.” [This forum post]((http://www.aeroxp.org/board/index.php?showtopic=5142&hl=) appears to be the source. I can’t really find any more information.

So… are we going to be able to write OSX applications in a dynamic language (hopefully Ruby!) when OSX Leopard comes out next year?