As iPhone apps push out their updates to be compatible with the new iOS 4, most are focusing on adding simple fast app switching capabilities. Many are also giving their apps a quick new coat of polish to make them look a bit nicer on the new Retina display found on the iPhone 4. The location-based service Gowalla is focusing heavily on the latter. Version 2.2 of Gowalla, which just went live in the App Store, is the first version of the app that is iOS 4 and iPhone 4-compatible. In the update notes, Gowalla, which has always been more design-oriented compared to its competitors, remarks on their excitement for the new Retina display: