Arkenor from Ark's Ark has an interesting post up on the new browser game World of LordCraft, which "borrows" artwork and design from Blizzard's World of Warcraft for a browser strategy game pitting Alliance vs. Horde. Or as they say themselves: "World of Lordcraft should be regarded as a fan game of WoW".
Arkenor thinks that the makers of World of Lordcraft are the same people who made Evony. And the makers of Evony are known for sueing bloggers. But I would guess that Activision Blizzard has a far bigger team of lawyers, and they might have objections against "fan games" making money based on Blizzard's intellectual property.
Thus we will see how well Blizzard is defending their intellectual property. Maybe they just don't care as long as the "fan game" is not a MMORPG, maybe they'll come down like a ton of bricks on them. Might be interesting to watch.
[EDIT: Today's news is that Evony dropped its libel case against blogger Bruce Everiss. Grats, Bruce!]