Last Friday and Saturday, about 130 linguists gathered at MIT for M@90: Workshop on Stress and Meter to celebrate Morris Halle’s 90th birthday, where phonologists celebrated Morris’s achievements as a researcher, teacher and “founder of modern phonology” (to quote Noam Chomsky’s introduction to Morris’s own talk) — while simultaneously making progress on some of the toughest problems in stress theory and meter (linguistic, poetic, musical). A great celebration honoring the greatest of linguists, our colleague, our teacher, our friend. We extend our deepest thanks to all who gave talks and participated in the (extremely lively) discussions.