I'm having someone design some artwork for my app, and I'm trying to get an idea as to the size.
If not altered, how tall/wide is the screen?
I need available background sizes for
Screen with tabs
Screen with Titlebar
You might try building yourself a very simple app with the areas you need designed, then install onto your device, then hit the home+power buttons at the same time and take a snapshot.
This will then save an image in your camera roll.
Then simply email this image to your designer, who should then be able to open it in photoshop (or whatever) and determine the exact pixel sixes you need for your app design layout. ;)
Hope this helps.