Bill, indeed some nice pictures here from that Oly.
As a matter of fact the C4000Zoom was also my first digital P&S, and I still have that camera. Although it's 'only' 4MP, I think it is a very capable and well made camera, with a great lens. Olympus cameras have always been known for putting out very good jpg files (they still are).
I remember having seen excellent pictures of mushrooms in the German magazine 'Naturfoto', shortly after I purchased the Oly. These pics were made with the same C4000z and blew me away.
There are still some nice websites on line, featuring this camera (as well as other Oly's from the same era) which I kept in my favourites on my home PC. There is still some very useful information available there about using flash, doing macro, etc. - if you are interested I can post the links here.
There is also the very nice Plonsky website on close-up photography with similar modest cameras (Canon G1) equipped with reversed SLR lenses : http://www.mplonsky.com
I think the Oly C4000z is a keeper. Even if it is only 'for old time's sake'. Nowadays nobody will give you a dollar for it anyway...