Python 2.7, increase limits, Cloud SQL Preview, Google Storage for Developers, Premier Accounts
Major changes:
Premier Accounts. $ 500 (excluding other expenses) per month for improved support (relevant for serious projects).
Now you can (experimental) use Python 2.7 in applications that work with High Replication Datastore. (To activate, use runtime: python27 in app.yaml). New in Python 2.7
The maximum number of application files increased to 10,000.
Maximum upload file size increased to 32MB.
Frontend request execution time increased to 60 seconds.
Increased URLFetch limits (runtime up to 60 seconds, maximum POST request size up to 5MB).
Added support for Cross Group (XG) transactions for High Replication Datastore. Read more
Now you can (experimental) work with Google Storage for Developers from the App Engine. Read more