Im with John on the Maestro issue.... Im a Merchant and accept all MasterCard International methods of payment and as far as I know they are still part of MC. There is a new company now called First Data that holds ownership, and I know that there is some rebranding going on... alas, Maestro is still very much part of MasterCard.

On a side note-- for those with memory... in Argentina MasterCard was known as ArgenCard until a few years back, especially for local credit cards. As weird as it may sound, some banks in Argentina still issue credit cards that are not valid internationally (ie they are only good in Argentina and some regional countries).