Did you know there's a new player on the e-currency scene - GreenZap!
They offer a MC debit card! http://www.greenzap.com
I think they will be getting really big. Right now they are giving $25 free to anyone who signs up and are paying $5 for referrals - so the marketing program is really strong. They also offer a Mastercard debit card to anyone who deposits $100 in their account, so this looks like a great way to transfer funds internationally very cheaply. II think this is the best alternative for a free MC debit card.