Google launched the App Engine release 1.5.1 this week. The release includes ProtoRPC as a Python API, which allows for the High Replication Datastore (HRD) available in the SDK.
New updates include:
Geolocation Header: The App Engine will now include a header along with each client request. This will help to identify the origin country of the user. This will allow web developers to customize content based on the location auto-detected by the new header.