In other o/s RSpec returns nicely coloured results (red, green etc).
However in the windows (Vista) command prompt my text output is just plain old boring white.
I had to install ansicon, and now everything is fine. (Even in my Aptana terminal).
Install ansicon description: http://qastuffs.blogspot.com/2011/02/how-to-install-ansicon-for-cucumber-to.html