Top 10 XML vocabularies?

The GRDDL PR Request was sent out and, crossing fingers, we should be in
PR at sometime next week.

Post-PR, I was thinking about ways to get GRDDL deployed more "in the
wild" and it seems to me the easiest way might be to get the top 10 XML
(or microformat, although that is more difficult due to use of profiles)
vocabularies to adopt a GRDDL transformation at their namespace document.

Could someone more familiar with what XML vocabularies are widely
deployed (cc'ing Henry Thompson, but would appreciate any advice) and
that have authors we might convince to add a GRDDL transformation?

-- 
		-harry

Harry Halpin,  University of Edinburgh 
http://www.ibiblio.org/hhalpin 6B522426