Lexicanum
The Lexicanum is an unofficial wiki based on Games Workshop's Warhammer Fantasy Battle and Warhammer 40,000 product lines. They're fully dedicated to record every bit of fluff there is, EVERY BIT. They do however refuse to record any kind of crunch on Warhammer characters for some reason, which is both bald and foolish as most Warhammer players prefer to look up the crunch on units rather than fluff, though there are a large amount of people who don't play the game for various reasons (cost being one of the biggest ones if memory serves, Warhammer 40k is very fucking expensive) but are interested in the fluff. They also have very a stringent policy on everything from articles and images to personal comments on talk pages, so much that you'll rarely see any non-Warhammer related humor in any of their talk pages or articles.
Regardless, the Lexicanum is still a good place to look up fluff on anything Warhammer as they've recorded almost all of it, just don't get confused in basing your army on lore than stats when playing table-top wise.
Inquisitor S.
The Grand High Marshall of Faggotry himself, Inquisitor S. Is the head admin on the english Lexicanum. He is against all forms of progression when it comes to the updating of the sites information and pages, and regularly bannes and blocks users who make contributions other than fixing grammar and punctuation, he makes it his job to ensure that zero new information is added to the site as to keep the site in the stagnent, un-altered, and "perfect" state is in now. While hi level of paranoia has ensured that ZERO fan-fiction enters the site, it is also the reason that the site is currently in a theoretical dark age where most of the information on the site is over 3-4 years old and stale and the site itself is severly out of date. This is most evident in the fact that the English Lexicanum (the one that he runs) contains only 5,000 articles wheres the German Lexicanum (the far superior version of lexicanum where Inquisitor S. got perma-banned from for being a faggot) has over 10,5000.
tl;dr: Make an edit that contributes the the site and you'll either get your edit reverted or end up banned. In fact, heres the link to his talk page...
Troll away