I received my gameduino on Sunday and stacked and plugged the parts. It's pretty easy to get the gameduino kit ready, even for me with almost no experience with assembling these kind of parts. Mine was pre-loaded with the asteroids game.
I got one for backing the gameduino project via Kickstarter:
http://www.kickstarter.com/projects/2084212109/gameduino-an-arduino-game-adapter?ref=live
and here's the gameduino project page (?):
http://excamera.com/sphinx/gameduino/
Just wish I have time to play with it today but it's time to go back to work...
Thanks James!