My OED is the one where the As were set in stone from 1882-1888. Surely they've done something since then.

Yup. Looked it up in the B&M Supplement. It says
Originally Posted By: OED Supplement
Revived, chiefly in the U.S.: to be the originator of (a book, play, remark, etc.)

It gives citations from 1940, 1957, 1959, and 1967.