The Googlers over Android Design have just put up some new sections into their guide for Android developers.
Highlights include a brand new section on how to create a design layout for application settings, as well as how to link other Android applications and how to navigate to your app using widgets.
In case you haven’t checked it out. Android Design is great place to start if you’re looking to create your own app, or just want to fiddle around with their design templates. you can get started here, or jump yo whats been updated here, here and here.