Hello! I'm new to the forums, and just finished the game a couple of days ago (Now in the process of doing it ALL again to get Everything, hehe). But I do know about MUSHs. You seem to be hosting the thing locally. But as you've said, it has limitations and problems of all sorts.
I think I have a solution for you, it's free hosting offered to MUSHs in the process of developement, it's got limitations (Max. 10 connects and the such). But if you have some knowledge it would be the best option.
I leave you the addy: ISUnlimited
I'd love to help you put this idea up and running. Psychonaut's Universe has so much potential.