I didn't include that option because it looks cheesy to have shaded drawings. Not to mention on black and white printers that shaded views can cause confusion due to the lack of detail or other features that might be not as visable as a simple line drawing. I think a hatch or actually modeling the knurls is a much better method.
For better image: Document Settings-Drawing tab-Use bitmap-Offline Only.
If your printer has good resolution even in B/W Inventor 2009 produces nice views. I agree it can clutter in some cases but sometimes it even enhances drawing's readability. It does look more like illustration. Some people like it. Other idea is to shade isometric view and use the leader to specify hatch there. Try it sometime.
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