Android 2.0.1, Release 1

Date: December 2009
API Level: 6

Android 2.0.1 is a minor platform release deployable to Android-powered handsets starting in December 2009. This release includes minor API changes, bug fixes and framework behavioral changes. For information on changes and fixes, see the Framework API section.

For developers, the Android 2.0.1 platform is available as a downloadable component for the Android SDK. The downloadable platform includes a fully compliant Android library and system image, as well as a set of emulator skins, sample applications, and more. The downloadable platform includes no external libraries.

To get started developing or testing against the Android 2.0.1 platform, use the Android SDK and AVD Manager tool to download the platform into your Android 1.6 or later SDK. For more information, see Adding SDK Components.

마이너 릴리즈라 크게 바뀐 사항은 없는거 같네요..
자세한 바뀐사항은 아래 링크 참조하시면 될 것 같습니다.
http://developer.android.com/sdk/android-2.0.1.html#api
http://developer.android.com/sdk/api_diff/6/changes.html