Question: I've been playing around with the iPad SDK looking for ways to improve my current iPhone app. I've got a couple place where I think the new "SplitView" would look pretty good. My question is if it's possible to navigate to a "SplitView" with my current navigation based application? Mainly I'm not sure how to push that SplitViewController onto my current stack of views. Any thoughts?

Answer: 
It should always be the root controller according to Apple.

> 
> The split view controller’s view
>  should always be installed as the root
>  view of your application window. You
>  should never present a split view
>  inside of a navigation or tab bar
>  interface.
> 
> 
>
You can use a UISplitViewController in a UITabBarController without any problems. I have not attempted to push a UISplitViewController into an UINavigationController however.