. . . wherein Paul Gorman plays with ideas for old-school fantasy roleplaying games
The International Heraldry & Heralds site is pretty interesting, particularly the bit at the end of the page about identifying bogus heraldry. Also the bit about abatements of dishonour.
Man I just spent too much time reading that site. Incredibly interesting stuff. I really appreciate how detailed but confusing the descriptions can be, and that they even have methods of indicating color when printed in black and white.
The real find on that page is the throwaway line about Satan's coat of arms (three green frogs on red).