Google releases Android 2.1 SDK to developers

Google has made available a software development kit (SDK) for version 2.1 of its Android OS, which is found on the newly-released Nexus One handset.
Yep, that's the same Nexus One that went on sale last week. Only now will developers be able to crack on with making apps that make use of some of its native features.
That includes animated wallpapers, telephony functions and improvements to the way apps interact with the Android browser, according to The Register.
The late release of the SDK shows one of the challenges facing Google. New iterations of the Android OS seem to be coming out every month, while handsets like the Nexus One are understandably kept (fairly) under wraps before their launch.
Yet the net result is that there will be a time-delay between the Nexus One's launch, and the availability of a glut of non-Google apps that tap into all its native features.

http://www.mobile-ent.biz/news/35619...-to-developers