Apple has launched an official directory of third-party web applications designed for use on the iPhone and iPod touch. This list of applications is broken down into categories such as “Entertainment”, “News”, “Productivity”, “Social Networking”, and more. Featured applications include Facebook, Digg’s iPhone Application, ESPN PodCenter, and others. In addition to the directory, which can be found at apple.com/webapps/, Apple is also offering an RSS feed of the most recent additions to the directory. Other links on the page lead to a feedback page, an explanation of web applications and how to use them, and information on how to create and submit your own web application. Somewhat strangely, the directory does not appear to have been optimized for viewing on an iPhone or iPod touch.