"We're not days away from launching the beta, but we're not months away either," Blizzard says. "At the Hearthstone announcement we committed to going into beta testing before the summer was over, and the team has been pulling out all the stops to make that happen."
This is the North American beta, though Europe, Korea and Taiwan will each get localized betas after the North American launch. The beta allows players to spend real-life money on card packs and area entry, and those that throw down some dough get a golden version of Gelbin Mekkatorque (shown below).
Blizzard is building the beta for PC and Mac first, with iPad in the cards.