Just a quick heads up, sending notifications from the OpenSocial container is now live and ready for use. As I mentioned in my previous blog, this is ideal for implementation of action prompting messages, such as turn based indicators. Per the updated Terms of Usage, notifications sent from the OpenSocial container are limited to ten at a time, and all ten must be friends of the current app viewer. Please make sure you familiarize yourself with the full updated details in the documentation.
You can test out notifications in action by checking out a Simple Notifications App and a Advanced Notifications App.
Here are some current known issues:
The App Notifications home page indicator isn't currently on. Expect this functionality to be turned on shortly.
Notifications aren't currently deleted when a user uninstalls an app. Expect this shortly as well.
Direct REST access to notifications (for mass messaging to all users). Just around the corner... ;)
Please let us know if you run into any problems or if you have any feature suggestions. We hope you enjoy this feature!