I wanted to gibe a try of wxRuby on Mac OS X SL (latest) after
installing wxRuby that way :

imyt% sudo /opt/local/bin/gem1.9 install wxruby
Password:
Successfully installed wxruby-1.9.3-universal-darwin
1 gem installed
Installing ri documentation for wxruby-1.9.3-universal-darwin...
Installing RDoc documentation for wxruby-1.9.3-universal-darwin...
imyt% 

with the following testing script :

#! /opt/local/bin/ruby1.9
# encoding: utf-8

require 'rubygems'
require "wx"
include Wx 

class MinimalApp < App
  def on_init
    Frame.new(nil, -1, "The Bare Minimum").show()
  end
end

MinimalApp.new.main_loop

i got :

LoadError:
dlopen(/opt/local/lib/ruby1.9/gems/1.9.1/gems/wxruby-1.9.3-universal-dar
win/lib/wxruby2.bundle, 9): no suitable image found. Did find:
/opt/local/lib/ruby1.9/gems/1.9.1/gems/wxruby-1.9.3-universal-darwin/lib
/wxruby2.bundle: no matching architecture in universal wrapper -
/opt/local/lib/ruby1.9/gems/1.9.1/gems/wxruby-1.9.3-universal-darwin/lib
/wxruby2.bundle

method require  in untitled document at line 29
method require  in untitled document at line 29
method <top (required)> in wx.rb at line 12
method require  in untitled document at line 33
method rescue in require        in untitled document at line 33
method require  in untitled document at line 29
method <main>   in first.rb at line 5


any idea ?

-- 
? Le verbe aimer est difficile ? conjuguer : 
  son pass? n'est pas simple, son pr?sent n'est qu'indicatif, 
  et son futur est toujours conditionnel. ? 
  (Jean Cocteau)