Java / Python SDKs 1.4.2 have been released, and Roadmap has been updated.

First I’ll tell you about the changes in SDKs, and then that the developers promise us in the next 6 months.

So,
- Capabilities API is no longer an experimental feature. Available in both Java and Python SDK.
- XMPP v2. Now with the support of presence and subscriptions.
- Added the ability to programmatically delete tasks from TaskQueue.
- Increased the maximum rate of replenishment of the queue to 100 / sec.
- In the URL Fetch method is added that allows you to check the certificate when accessing the host via https.
- Improved Memcache API.
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Go to the roadmap.

From the old:
- SSL access on non-appspot.com domains
- Background servers capable of running for longer than 30s - this is already partially implemented.
- Support for running MapReduce jobs across App Engine datasets - they promise Shuffle and Reduce phase soon, Map phase is already quite ready and viable.
- Bulk Datastore Import and Export tool
- Improved monitoring and alerting of application serving
- Raise HTTP request and response size limits - many limits are already increased in 1.4.0 version.
- Programmatic Blob creation in Blobstore

From the new.
- Full-text Search over Datastore - well, finally (!!!)
- Support for Python 2.7
- Logging system
- Integration with Google Storage for Developers is great too, IMHO
- Quota and presence improvements for Channel API

SDKs analysis:
- In the Python SDK, some files and logservice packages appeared, in files while there is only PB a protocol description, from which it can be seen that this part refers to creating files in a blobstore programmatically from the application. Matcher API renamed to ProspectiveSearch API.
“The rdbms package appeared in the Java SDK, that is, it refers to SQL.
All these features are waiting for us later.

Full lists of changes:
- Release Notes: Python
- Release Notes: Java
- Revision History
- Product Roadmap