Messenger trough web interface?

Does anyone know a site that offers a web-based client that communicates with the MSN servers? The reason I’m asking is that here at work, port 80 is just about the only open port and I would like to use messenger.

I know there are other options like HTTP tunneling etc, but I know it’s technically possible to make a web interface for messenger, and was wondering if anyone knows if such a tool already exists… I don’t feel like writing one myself :slight_smile: