Blizzard has thrown back the doors on Battle.net Balance, its new online payment service which allows players to add funds to their Battle.net account, the balance of which can then be used to purchase Blizzard Entertainment products and services directly through Battle.net.
Products and services currently include certain World of Warcraft paid services, as well as digital versions of select Blizzard titles. With the upcoming launch of Diablo III, players in certain regions will be able to use their balance to acquire acquire items from the game’s currency-based auction house.
Keep in mind that any amount of money you add to your Battle.net Balance is non-refundable and unable to be converted into cash, although some regions will be eligible to receive cash payments via Paypal for sales of items from the currency-based auction house.
For a full FAQ, head over to the Battle.net website.