Hi,

After several months of development and some slight delays, MacRuby
0.4 is now available. Get it here while it's still hot!

MacRuby is a version of Ruby 1.9, ported to run directly on top of Mac
OS X core technologies such as the Objective-C common runtime and
garbage collector, and the CoreFoundation framework. While still a
work in progress, it is the goal of MacRuby to enable the creation of
full-fledged Mac OS X applications which do not sacrifice performance
in order to enjoy the benefits of using Ruby.

You can learn more about MacRuby, and download a binary installer,
from the website:

http://ruby.macosforge.org

Or about this release more specifically, on our blog:

http://www.macruby.org/post/macruby-04

Enjoy,

Laurent