Jetpack 1.9 is here. That’s right, it’s time for another big helping of Jetpack awesomeness. This release brings you Toolbar Notifications, Mobile Push Notifications, Custom CSS for mobile themes, a JSON API, and improvements to the Contact Form.
Notifications adds a menu to your toolbar that lets you read, moderate, reply to comments from any page on your blog. Plus, if find yourself on TechCrunch, GigaOm, or any of the millions of other sites running on WordPress.com, you’ll be able to view and moderate comments on your own site from the toolbar there, too.
Mobile Push Notifications for iOS: Users who link their accounts to WordPress.com and use WordPress for iOS 3.2 can now get push notifications of comments.
Custom CSS can now be applied to mobile themes.
The WordPress.com REST API is now available in Jetpack. That means developers can build cool applications that interact with your site, and applications built on this API for WordPress.com can now work with Jetpack-enabled sites, too.
The Contact Form has been overhauled to fix incompatibilities with other plugins, and Sync has been improved to ensure consistent data from your Jetpack blog is available in your Site Stats. For a complete list of bug fixes, see the change log.