This is the first in a series of Haiku GUI designs that I plan on doing.
This is what I call the 'Parallel Menu View'
http://master-of-design.deviantart.com/#/d4oiq47
The menu, instead of opening like the old traditional menu (as seen in OS's like WIN95) has an updated look. The menu opens smoothly to the left. Once a subfolder is selected (in this example I chose the Applications folder) another menu smoothly opens again to the left. The Icons seen in the Parallel Menu are just a few, and scrolling up and down lets users access all Application launchers. Once cursor hovers over icons, arrows at the top and bottom would appear to indicate that there are more icons available to choose from.
There would be a Settings program that would allow the user to shrink the icon size to fit more Icons on the second menu, add content to first menu, tweak font size. However the background color of menu would stay at a constant to ensure that the Haiku design was kept at it's standard.
There is a lot of space in the first parallel menu, but folders can be added and of course once selected would open up the second parallel menu thus displaying the contents.
Tell me what you think. This is based on the new folder display from Mac OS X Lion. But the design I used really stays true to Haiku and it really doesn't take away from the classic "Haiku-look" very much.