Is this a credit or debit card?
Credit card: lots of risk on both sides, amount I own is dependent on the exchange rate when you send bill. Your payment is dependent on exchange rate when you receive coins.
Debit card: risk depends on currency the card stores
This is a debit card. Basically, you send the bitcoins over for the balance you want on the card and we apply cash to the card for you use to use instantly at merchants who accept Visa/Mastercard. All this is converted towards the exchange rate on the fly. We've figured out how to eliminate any risk with this. There will be an official thread shortly (today/tomorrow) regarding this. Thank you for the question!