If you really are looking to get back into a mud, go check out :
http://www.mudconnect.com
But it seems you may feel the same way about muds as I did about the Police Quest series, it was just so much fun, and games these days just didn't stack up.
But in actuality, it was my lower expectations that made the game so great, when revisiting it, it lost it's appeal.
But, maybe you will enjoy them once again. Have fun !