As I understand it, Eltoshan, any debit card that can be used in place of a credit card under normal circumstances should be just fine. Usually, so long as a Visa or Mastercard logo is featured on the card, you're good to go, but you'll want to talk to Billing to get any definitive answer. You can contact them via e-mail (firstname.lastname@example.org) or phone (1-800-59-BLIZZARD) between the hours of 9 a.m. and 6 p.m. Pacific time, Monday through Friday. In any case, friend, I wish you the best in your efforts. :)
Look at my works, ye mighty, and despair...