I have been working on an Atom Publishing Protocol client. My goal is focus on the user interface and make it as simple and easy to use as possible. I mention this because I think that being able to create a specific view for a user is one of APP's greatest strengths. APP allows one to create a simple client for a specific application using whatever language or tools that are available, which I think will be a huge benefit to users in the long run. The browser has made huge inroads in creating one platform for users to become familiar with and based on the success I think we can continue to make specific web based clients for APP, which continue to extend the web.