Google Mail: BETA!
Google Maps: BETA!
Google x | x is a Google project name.
Android was released as 1.0 version. No "BETA" word applied to it. But with the latest repository merge, they're loosing control of the huge number of sub-projects and modules of the project.
They are publishing code stubs, fulfilled with comments (not very useful in most cases), without any implementation example.
I hope Google is having strictly coupled information exchanges with big mobile devices manufacturers, or they'll soon branch the Android project, choosing their best way to implement what they need.