BREAKING NEWS: Moments ago, Apple began a roll out updating the app store in iTunes (not on iPhones and iPod Touches).

The main differences are on the description pages for each of the apps. The screenshots are bigger, there's no blue/gray gradient in the background, and the layout is moved around. Not all applications have this new change yet as Apple is still rolling out but they all should as soon as possible.

You can also now share applications on Facebook and Twitter, which is probably going to be the biggest thing shared on iTunes. Music and movies was a good idea, but apps are what people like to discuss.