I have left Microsoft and this blog is no longer under my control. All of the content should remain for some time however and any new updates can be found at http://davedev.net.
-Dave, September 2013
Great News! My team has recently finished adding an entire Game Development Track to Generation App and it is totally free.
We have broken up the content into four different weeks focused on 30 different topics. Whether you are a beginner or and advanced programmer we take you from the basics .of game design all the way through specific game technology topics ending with publishing to the Windows Store.
Don’t have a lot of time? We created short (5-8 min) weekly overview videos that will cover the topics for each week.
Already registered on Generation App? No problem you will now get the opportunity to switch between Windows Store Apps, Windows Store Games and Windows Phone.