I've started a basic doc on ideas for a GreaterMUD database editor:
http://www.greatermud.com/wiki/index.php/Idea:GreaterMUD_Editor
Feel free to add your own ideas (things that bug you about NMR, or things that could be done differently). All I ask is that you work from the idea that we're (generally) constrained to MajorMUD's database layout (text blocks, messages, etc).