According to BlizzPlanet, an officially licensed World of Warcraft Monopoly will be unveiled at next week's Toy Fair 2012 in New York City. There really aren't any details as of yet, just that the board game will be showcased. Presumably, though, there will be a lot of customization involved, right down to the playing tokens.
Perhaps even more exciting than Monopoly (a game I am incapable of losing, FYI) is the companion Blizzard tie-in, Risk: StarCraft. Supposedly, the playing pieces for that game will include StarCraft II units. That's all sorts of awesome.
Update: BlizzPlanet has removed its references to these games in its Toy fair 2012 posting, so it's possible USAopoly was not prepared to announce these products yet.