[MacRuby-devel] Mixing ruby code with Objective-C code within a Cocoa project...

Greetings: I'm a MacRuby neophyte and wonder if I'll be able to mix Ruby with Objective-C, similar to the ability to write Objective-C++ code. I'm particularly interested in exploiting the power of Ruby's terse language to aid in Objective-C projects; preferably for iOS. Or... would I have to keep Ruby code in its own .rb file and pass data to/from ruby routines as parameters. Any info? Demo code? Regards, Ric.