This example illustrates a few of Nexus's more unusual options: the scrollbar can be flat (it can also have a gradient fill); the scrollbar can auto-hide when not needed; and menu items don't have to have a 3D-button style. Items can also underline when focused.
You can also see that items can each have their own text color (which can be inherited by any sub-items they contain).
This example also shows Nexus' search features: you can run Find or Find Next searches via JavaScript to find items on the menu. For instance, try searching for flash, java or nexus.