I've seen it before on the Web and this news group and am hoping for
new ideas.

I have a yard that is heavy shade and therefore all moss. Well, that
is when we moved in. I think the housewife living here before us had
the time to go out every day and pull weeds. Now weeds are growing in
the moss. It's all kinds of weeds, not just broadleaf.

How do I get rid of the weeds but keep the moss?

Roundup kills the moss. Pulling the weeds by hand is out of the
question. Maybe a pre-emergent next Fall (although since I live in the
South, I expect the weeds to live all year)?