Wow!! I’ve been waiting for this, fantastic.
About the appearance, I prefer the classical windows toolbar with lets say one tab for midi (ports, channels, midi monitor) other for preferences and another one for the program manager (even almost all of these options are available from the panel itself, so they aren’t a must).
I can help you with the wiki, I have a sf.net account (don’t expect too much, I have little time and writing in english is still an effort for me). Tell me how to help.