The Armed Forces of World War II, a flash presentation of rank insignia. The creator implies that it's a work in progress, but what I've clicked through seems pretty complete to me. Bonus Babylon 5 link on the left.
I Could Tell You But Then You Would Have to Be Destroyed by Me is a new book by author and interesting person Trevor Paglen. He collects patches designed by military personnel to commemorate secret "black-ops" projects.