Credit to 60beetle60:
http://forums.whirlpool.net.au/forum-replies.cfm?t=1729658&p…
Still new to the whole Android scene, but I am assuming you have to setup an Amazon account for this as per previous posts:
http://abtevrythng.blogspot.com/2011/03/how-to-use-amazon-ap…
It's similar to robo defense.