Apple Store app on iOS devices

Apple just released the Apple Store app — a new app for iOS devices (though not a universal application). The new app is essentially a hub for the Apple Stores business (be it online or retail). For now it is only available in the US App Store.

Update: It seems you can pre-order an iPhone 4 through the app.

Update 2: Pre-orders have started today and are already bringing down the online ordering system. AT&T system seems to the cause to this problem.