Demeter is played by the beautiful and German Stefanie von Pfetten in the Percy Jackson and Lightning Thief movie.
In his Nicomachaen Ethics, Aristotle blamed playwright Aeschylus for revealing some of the secrets of the Eleusinian Mysteries, a crime punishable by death. Eek.
Cereal (yep, like Cheerios) is named after Ceres, Demeter's Roman counterpart (source). We bet you can guess why.
Marvel Comics made a character out of Demeter; she first appeared in Avengers #50. And boy, can that girl dress.
Watch out for Demeter's daughter, Persephone, who is the main antagonist in the PlayStation video game God of War: Chains of Olympus.
Ceres, a dwarf planet between Mars and Jupiter, is named after Demeter's Roman counterpart. Maybe now that Pluto's out, Ceres can get promoted?
Demeter also gave her Roman name to a non-profit organization that works toward a sustainable (environmentally sound) economy.