Apple Store App 1.0.1
the author of this app says:
Tap the Apple Store app on your iPhone or iPod touch, and you can do all things Apple. Buy Apple products and accessories, read customer reviews, find an Apple Retail Store, stay up to date with in-store events, and make Personal Shopping, Genius Bar, or One to One appointments.
The Apple Store app is also the easiest way to buy or reserve your new iPhone right from your current iPhone. You can do it in just a few taps, without entering your AT&T account information. Order your new iPhone from the Apple Online Store and it's shipped to you free and ready to use. Or reserve your new iPhone, pick it up at an Apple Retail Store, and we'll set it up for you in minutes.
Compatible with iPhone, iPod touch, and iPad. Requires iPhone OS 3.0 or later.