Ultima IX Easter Egg - Gravestones in Britain, Also Journal

Go to the Britain Graveyard. The gravestones there all have the designers' names with a mostly quite sarcastic poem on them, just like in Baldur's Gate (see the page on that game). There are references to Ultima Online, too (as in "Mitch got PK'ed" (Player-killed: Killed in a massively Multi-player RPG by a player making a habit of slaughtering the weaker players)). One particular gravestone summons a skeleton, which will then fight you (every time you hit it this lowers your karma, I'm not sure if this is normal for skeletons).
Another egg I found is your Journal. If you keep leafing through the pages you will find quotes from the designers on the last few pages, quite funny to read.