
World of Warcraft's next expansion will introduce player housing and it's coming with WoW's first ever premium currency. Wowhead recently dug up something called "Hearthsteel" in the files of the Midnight alpha and now Blizzard has made a blog post confirming that it's real and on its way with the expansion.
It clarified a few basic things, like being able to buy Hearthsteel with your Battle.net balance (and therefore with in-game gold via WoW tokens) and that it intends to keep the catalog small compared to what you can earn by playing the game.