Twitter web application

I want to create a fairly simple Twitter web application. This involves creating a site where Twitter users can register (similar to wefollow) and then follow people similarly to Twitter Karma. A more detailed design document will be provided to bidders. The application involves using the Twitter API's as well as storing data in a database. The application itself is pretty simple but important will be the UI design. Please provide some examples of web 2.0 UI you have created before.