I saw on the tech board, somebody was asking for a technique that would allow the viewport to fade out. I think you can achieve this now if you put an object in your viewport with a transparent gradient. In the image you can see I created a gradient that changes from solid white to transparent. I used the attribute mapping tool to control where the transparent and solid parts are, and I also used the attributes palette to change the gradient from a linear gradient to a radial gradient.
I know that it seems like a lot of work to name all your viewports, but when you want to use the new linked viewports feature or you want to edit the classes on viewports (using visibilities on the organization dialog box), you need to have a way to know which viewport you are affecting or choosing.
Sometimes, i make the mistake of creating my section viewports with the wrong direction. This might seem like a problem, but it is not. On the Object Info palette there is a button to reverse the direction of the Section Viewport.