A very strange iPhone app called GameStore, which appears to be by Apple, is showing up internationally in the iTunes App Store. It's icon is a shopping cart crammed in the lower left corner and it's functionality seems curious to say the least:
This application allows you to buy different things from within the app.
iTunes desktop shows the release date as Dec. 31, 2011. App Store on iPhone shows the post date as June 9, 2009. Make of that what you will.
Whether this is an internal Apple test app that was never meant to go public, or if there's a different explanation, we're not certain. In the meantime, you probably don't want to spend $0.99 on it.