Android[tm] SDK development is for those who have a dream mobile device in mind and have the potential to contribute to the development of the same at various levels. http://www.openhandsetalliance.com is promoted by Google & other industry giants.
Love the Android Software Development Kit being playing with it for a while now for Apps for my Android Smartphone http://www.myhtc.biz
don't know how I'd live without it for my o2x. Must have if you are a rom flasher:)