Other Links: http://blog.mugunthkumar.com/coding/iphone-tutorial-%E2%80%93-in-app-purchases/ http://troybrant.net/blog/2010/01/in-app-purchases-a-full-walkthrough/ This iPhone SDK tutorial is the first in a multipart series on selling products and services “in-app” with the Store Kit framework. Expect to learn the benefits and limitations of using the In App Purchase feature, the steps necessary to register paid “in-app” content with Apple Inc., how to setup a simple store front, and the difference between the Built-In Product Model and the Server Product Model for content distribution and order fulfillment. 1. Prequalify Your Content One of the most powerful features released with the iPhone SDK 3 is the ability to process “in app” purchases. Because the App Store handles payment authorization and processing on your behalf, this feature makes selling virtual goods or services significantly easier as developers are able to focus on creating and selling great content ins