Apple has updated its official Apple Store app, now available for free on the App Store. The new update allows for options to manage your account and billing right on the phone. You can also browse through all of the various carriers available for Apple's iPhone. For those of you in the Netherlands, the app is available for you now, too.
Apple has pushed up the requirements for the app, so you'll need iOS 4.3.3 or higher to run it. We're all at least up to 5.0 by now, right? You can find the update in Apple's official App Store app. So... you can update Apple's Apple Store app by using Apple's App Store app. Sheesh.