MW v4.8 already has a meta data editor, but it is hardly used.
It's written in VB.NET so it should be rewritten to C# and optimized.
I think we should make meta data more eminent.
"What is data without meta data?"
Using the new layer manager (http://mapwindow4.codeplex.com/discussions/277940) we can also show the meta data and let the user create/modify meta data.