If you are skilled with photoshop you are now able to fool even the savviest of venture capitalists.

Or if you really do need the money, Geoff Teehan and crew have come up with a Photoshop PSD library full of UI assets that you can use to come up with beautiful pictures of your soon to be completed app! They have recently updated the images to a higher resolution for use on the Retina Display. The download is available for no cost. Hope all you app developers find this useful!