Hello,
I'm completely blind/VI and connect through VIP MUD and have since 2009 when I went blind.
I can give instructions on how to connect through VIP MUD if you like - feel free to email me. Basically you need to input the key you get after logging into the website into the MUD.
I do wish some of the actual clients were accessible - I sent a note to feedback several months ago asking if it was possible, though not sure if anything was done or put in motion.