Google Release App Engine SDK Version 1.3.1
Google have announced the release of version 1.3.1 of their App Engine SDK for both Python and Java.
Version 1.3.1 introduces a new unit-testing framework which enables the integration of App Engine apps into other existing testing and automation frameworks. Datastore Query Cursors mean applications can now 'bookmark' their progress, to be resumed later. Google have also removed the maximum result limit - whether you're doing a fetch, iterating, or using a Cursor. Datastore calls (with the exception of transaction commits) are now all automatically retired when an application encounters a datastore error, which means the user is no longer bothered with the Datastore's errors.
Complete release notes, can be viewed at the Google App Engine page.