Gowalla is a service that has been getting a lot of buzz lately. If you're not familiar with it, it's a location-based social networksing service that comes in the form of mobile apps. Gowalla announced today, the availability of Gowalla 2.0 for the iPhone 3G and 3GS platforms. Gowalla highlights the following new features with this version: - Design Gowalla developers have created a fresh new experience that is more flexible, readable and usable. - Photos Gowalla 2.