Two questions, since you seem to know something about this:

1. What's required on the client side? Some sort of local proxy that sits between your off-the-shelf client (e.g. zMud) and the MUD?

2. I can't see this being very useful for broadband users, so I'll assume the target audience is players who use dial-up. Don't the popular modem connection protocols (V.90, etc.) already include compression? If so, is MCCP even supposed to provide any benefit on the client side, or is it designed solely to reduce outbound bandwidth on the server?