Just a few (potential) improvements to Google's cloud-based services. App Engine version 1.6.5 is the fourth release this year, and according to the Google Developer Blog, the improvements include changes to Datastore, the Images API, and a few other things. The team has added projection quereies to the Datastore. Projection queries allow for the querying of specific properties within an entity. THere are some rules and limitations to this type of query, which you can read about here.
App Engine 1.6.5 also enables the images API to access image objects stored in Google Cloud Storage, and the Task Queue now allows you to get your stats and info from within your application.
For our java-based Google App users, you'll be interested to know the following:
Finally, an important piece of news for our Java developers: the <threadsafe> element is now required in appengine-web.xml file; omitting it will cause an error in the dev appserver.