I have just released node-webduino - A web FrontEnd for Arduino. Node-webduino will let you do real-time I/O monitoring and controlling in your browser. See README.md on the repo for more information:
It seems, that you need an additional server/service locally to connect to the arduino via webbrowser.
You should make this a bit clearer in your project description, so most people would expect, that the webservice runs directly on the arduino using an ethernet shield.