Download it here.  Via the developers blog.  Changes:

• Adds annotations for test systems, no actual (non-test) API changes.
• Adds a method to allow a process to easily determine its UID.
• Adds support for marquee in layouts.
• Adds new methods for determining padding in views. Useful if you are writing your own subclasses of View.
• Adds new permissions that allow an application to broadcast an SMS or WAP Push message.
• API cleanup: removes protected constructor from SDK-bound system images.