In the process of posting the recent update about the new Ultima 6 Online client, I stumbled across this Blogspot blog, maintained by a fellow who styles himself Hank the Ranger.
About his website, he has this to say:
This blogspot is a library of all the wonderful, unusual, or (dare I say it) notable things I have found out about the Ultima VI Online. Above are links to the various Ultima VI Online resources I have created or maintain. Below are special links (runic alphabet). They are broken up into a series of “notebooks”. I hope that in each notebook you find something interesting and useful to you. Thanks for reading, and please let me know what you think of these notebooks.
The content on the site is broken out into numerous categories, most of which are then broken into sub-categories. If you wanted to know about pretty much any aspect of the game, the site seems like a pretty decent resource. Details about maps, magic, in-game items, quests, karma, and more can be found in its various pages and sub-pages.