
* New user interface - As I mentioned when we introduced the m3 version of the Android SDK, we're continuing to refine the UI that's available for Android. m5-rc14 replaces the previous placeholder with a new UI, but as before, work on it is still in-progress.
* Layout animations - Developers can now create layout animations for their applications using the capabilities introduced in the android.view.animation package. Check out the LayoutAnimation*.java files in the APIDemos sample code for examples of how this works.
* Geo-coding - android.location.Geocoder enables developers to forward and reverse geo-code (i.e. translate an address into a coordinate and vice-versa), and also search for businesses.
* New media codecs - The MediaPlayer class has added support for the OGG Vorbis, MIDI, XMF, iMelody, RTTL/RTX, and OTA audio file formats.
* Updated Eclipse plug-in - A new version of ADT is available and"
The Gizmodo also has some good pictures of the new interface and it looks sweet.