Android TM is the first free, open source, and fully customizable mobile platform. Android offers a full stack: an operating system, middleware, and key mobile applications. It also contains a rich set of APIs that allows third-party developers to develop great applications.
Google AppsTM is native with this platform, so you can expect solid integration with your mobile communication needs.
Google VoiceTM is also native with Android and offers unified communications that will set the new standard in mobile.