Learning Ruby Metaprogramming

I've found this single page to be an excellent reference on Ruby metaprogramming:<p><a href="http://weare.buildingsky.net/2009/08/25/rubys-metaprogramming-toolbox" rel="nofollow">http://weare.buildingsky.net/2009/08/25/rubys-metaprogrammin...</a>

An excellent online course for learning Ruby metaprogramming by Satoshi Asakawa.