Rebound from @matgallipoli awesome free PSD. You can download the free After Effects Template here: http://uxinmotion.net/content/iphone-04/
The download includes 5 After Effects render presets including a special one I made for the Dribbble community at 800px x 600px. It's all drag and drop so once you create a cool screen animation in After Effects, import this, swap a single layer (instructions and video instructions included in above link) and you're good to go!
keyboard shortcuts: ← previous shot → next shot L or F like Z toggle zoom