LMud is a MUD (Multi-User Dungeon) Game implementation written in Common Lisp with heavy use of CLOS and multiple inheritance. It's threaded, currently relying on SBCL x86 for threading support. It has a CLIM-like command processor and will support smart terminals using Terminfo and some hack based on Linedit. It will eventually also have support for interaction with IRC via special rooms (#lisp will of course be the first).

The (re)design is fairly complete and implementation is underway, but there's a lot of work to be done. Help is welcome and there are a number of interesting things to be worked on (command processing, object persistence, threads and locking mechanisms, security, etc). The project page provides a link to the CVS repository.

If you're interested in helping please contact me, James A. Crippen. I'd love additional brains on the job. There's no mailing list yet but if enough people are interested I might make one.