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Summing Up
We've added Chatter and actions to our Recruiting app, but we've barely scratched the surface. With Chatter, you give your users the power to stay on top of everything that's happening in your company, and you enable them to easily collaborate and share information. With actions, you let your users more easily create and relate records. And because it's part of the Force.com platform, you can incorporate real-time feed updates, user profiles, groups, and more into all of your custom applications.
If you dig a little further, you can learn how to programatically add posts and comments, add feeds to custom pages, and even expose actions for integration with external systems.
These advanced subjects are beyond the scope of this book, but you can find out more on the Chatter Developer Resource page at developer.salesforce.com/page/An_Introduction_to_Salesforce_Chatter.