Develop a Digg-like site using Ruby on Rails

Help develop a site with similar functionality to Digg using Ruby on Rails. You need to have very strong experience with Ruby on Rails, CSS and HTML, and preferably Web 2.0 design concepts. Study Digg carefully and implement a system with similar features: - Register, Login - Post, Tag - Email It, Blog It - Comments - Users, User Rank - Topics, Popular - RSS - Addition: an iframe snippet of code that allows other sites to embed this