Common Menubar

Hi! I read an article tonight about how certain aspects of the Mac OS(X) is faster than their Windows counterparts. One of these items was the common application menubar on the top of the screen, which allows users to move their mouse to the menubar a lot faster than in Windows.
I remember seieng a while ago, in one of the operating systems or window managers that I was trying out, an option to enable a common menubar on the screen.
I was wondering how hard it would be to enable similar functionality inside Haiku/BeOS? I’d imagine that the rewriting of the part of the App Server that handles Menu creatings would have to be changed to add new Menu creations to a Roster type thingie that would only show the current app’s menu on the top of the screen. But would that be able to happen without modifying App Server and using an addon? Or would it have to be modified?
I’m still going through O’Reilly’s Programming the BeOS book, so I don’t know much about the internals of the BeOS.
What do you guys think?

I agree with the idea of a unified menubar in general — it is less confusing. But doing so would change the overall aesthetic of Haiku. I don’t want to see a menubar at the to of my screen — I want a menu “box” at the top right. It is one of the unique interface elements of haiku to me. However, for those who set their deskbar to behave like a menubar, a unified approach would be best. But, thee would need to be a way to tie that preference into how the windows are drawn.