I added the iOS 5 Twitter functionality into an App.
The App-Design is “without” statusbar. The guidlines from apple said, that an App with network shouldn’t hide the statusbar because the informations about the network activity.
Is it an reason for rejection to hide the statusbar with twitter integration?
I have faced the similar problem. Don’t worry, It is just fine If your App doesn’t have a status bar, at all. It won’t get your App rejected.
The thing is your App shouldn’t have is inconsistent behavior. This is what, Apple guys gets annoyed by.
Good luck with your App 🙂