A good talk and the REST interface to XBOX Live is intuitive and simple.  Now, how do I develop the actual substance of an XBOX game on windows 8.

The talk said we will be given all the tools/renders that are available to console developers.  For example exactly how would I make an XBOX Avatar appear in my game.  What namespace is used, and is there any examples/tutorials.  Since WinRT does not have XNA how can it be done?

Thanks,