WOW Token is live today on April 7th
The WoW Token goes on sale already in the Americas game region, including North America, Latin America, Australia, and New Zealand today. With the WoW token system, players can buy game time with gold in-game, or buy game time with real money and sell that game time via a token for gold in-game.
The starting price will be 30,000. The WoW Token will be available for $20USD/$25 AUD from the in-game Shop.
Here is the token overview from Blizzard.