just starting to roll out in the US, it'll be awhile yet before you can cut up those credit cards for good. But in the present, at least, you can use your handset to make sure you don't get stuck with a $100 bar tab... again. Discover just announced that it will let its cardholders send money to people in 60 countries -- so long as they have either a cell phone number or email address. As AllThingsD notes, Visa and American Express have hatched similar plans, though Discover is the first of the bunch to partner with PayPal. While people sending money don't need PayPal accounts, people receiving moola do -- or, at least, they must be willing to create one. For senders the service is free and, in fact, they get 0.25 percent cash back for the first $3,000 exchanged. As for Discover, a smaller player than Visa and MasterCard, it hopes some of PayPal's 230 million customers will sign up for a shiny new credit card while they're at it.