I've been working a lot with Photoshop .psd files recently and have been bouncing back and forth a lot to ensure colors look just right on the iPhone.
Can anyone offer some tips on calibrating macbook/apple cinema displays in regards to keeping color consistency between Photoshop, the iPhone simulator, and physical iPhones?
Have a look on LiveView created by Nicholas Zambetti.
You need to install it on your iPad/iPhone/iPod Touch and on your Mac. when synced (Mac and device) you can have a preview of the selected area of your screen (Mac), on your device.
Hope this will help you out!
Cheers,
vfn