There are two instances that come to mind in the new iOS 5 where a user can drag down to reveal a view. If the user drags down from the status bar at the top of the screen, it will reveal the notification center,

Also, if the user is in the Weather app and drags down on a specific day of the week, it will reveal the hourly forecast,

Is there a simple drop-in framework that can offer me this functionality? Or is there example code out there on the internet to be able to mimic it?
If anyone’s interested, I’ve posted up code of how I accomplished this here: JCWindowShade. The relevant code for tracking is here: handleDrag.