Look very neat! I'm completely falling in love with the old-school-looking (which I guess will be the default look) GUI of AMiGA OS 4.0.
Concerning the icons... the only thing I really dislike with the deafult GlowIcons-look is the, to me, extremely annoying "fading into a gray background"-aura surrounding the icons. They look really bad on any other background than gray... one really simple sollution to this would be to make a small black outline surrounding all of the icons... it's pretty common use everywhere else.