NIMHmuck was a text-based multiplayer role-playing game set in the universe of the Secret of NIMH. It ran from 1998 to approximately 2016, with Simon as the last head admin. Due to technical and time constraints, as well as a diminishing presence, the MUCK server was shut down, with the intention of replacing it with a Discord server, however this move didn't end up working out in practice.
If for whatever reason, you'd like to contact me about something related to NIMHmuck, feel free to email me at simon.tesla@thornvalley.com