Greetings. My name is Jeremy Trammell and I represent a group of developers and designers in Portland, Oregon, in the U.S. We have extensive experience with Javascript and the excellent node.js library, and we would be happy to assist you with your project. I'm a little unclear regarding exactly what you want done, though. For example, first you say non-authenticated, but then later on you request user authentication. We can provide whatever features you need, but here is what our bid currently includes: A node.js chat server with support for user accounts, online/offline/typing status, private messages, multiple rooms, rich text, and a web client for interacting with the server.