The Nexus One burst onto the scene rocking Android 2.1 and now developers can finally get their hands on the SDK for this latest Android release. The SDK offers minor improvements from Android 2.0 and includes new APIs to develop animated wallpapers, a new SignalStrength class which contains phone signal strength data and new methods to add geolocation, improved video handling and more to Android’s WebKit-based browser. It’s available now for developers to download via the Android SDK and AVD Manager and gives developers a small headstart on making their apps compatible with Android 2.1, which is expected to roll out to the current crop of handsets later this month.