I've been working on a mud implemented in python. For the uninitiated, mud stands for multi-user dungeon, and they are usually text-only multi-player games run over telnet. The first MMOs. It's cool because it is a modern project, using twisted for networking, it's event-driven and scripted, as opposed to hard coded and tightly coupled. The whole project is still highly in development and may not actually be in a working state but it's a labor of love. https://github.com/danielmunro/mudpy