With the release of iPhone OS 3.1, App Store customers now have new views into what's available on the App Store.
Genius Recommendations for Apps: Available in the Featured section, customers can now receive recommendations on apps based on the apps they’ve already downloaded.
Top Grossing: The Top 25 section now includes a Top Grossing category which provides users with a new way to find popular paid apps.
App Store Essentials: Customers can explore themed collections of the best applications on the App Store with App Store Essentials located in the What’s Hot section. The first two collections there are Go Green and Social Networking.