The newly added manual content can be created in the Content section of the app builder, just like you would do for the smartphone apps. This content will now be available under your Design - Tablet section, where you can just drag and drop it to your iPad page.
The features/modules currently available for the iPad version are:
News ( Manual / RSS )
Videos ( Manual / RSS )
Photos ( Manual / RSS )
Song / Track
We'll be adding additional features in the future to include more functionality for the iPad version.
Related:How do I add content to my iPad app?
How does the News module work?
How does the Photos module work?