I guess I'm one of the lucky ones that had our Piper show up at the house on Christmas Eve.
Put it together with the kids; package was missing about a dozen brass screws, but I had some 6x32 of the appropriate length stainless lying about in the shop.
Situation 1: Powered the unit up - everything works up to the desktop. When I try to mouse over the task bar/dock, it "jumps" to the middle of the screen (and the menu disappears! doh!). I was able to make this behavior stop by right clicking and opening the preferences window - this seems to force the dock to anchor to the top. I was able to more permanently fix this problem by turning off the auto-hide feature, and also by telling the dock to not force itself on top of all other applications (since this combination would otherwise interfere with minecraft)
Question 1: Why is this happening?
Situation 2: Launched Minecraft Pi. Game looks like minecraft; but while there is a world around me, I dont see any of the materials described on the website, aka "you realize that you are sitting at mission control in a modified Minecraft world. You are sending a robot to an unknown planet and on the way over his hardware is damaged. Now it's your job to build his hardware in real-life, to control him on the screen. You first build his controller to navigate. The schematic on the screen shows you how to build and gives you realtime feedback as you add your buttons and wires correctly. "
Question 2: Where is the customized world that will actually let me do what Piper is supposed to do?
Thanks for the insights!