Skype today announced that Wal-Mart is now offering Skype Certified hardware as well as the first pre-paid cards for Skype available in the U.S. in 1800 of its U.S. stores. al-Mart is the first and currently only retailer in the U.S. to offer Skype's pre-paid cards. Shoppers can purchase a $20 pre-paid card and redeem it for Skype credit to make inexpensive international calls at rates as low as 2.1 cents per minute.

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