A World In Which Google Wallet Is Useful

    The biggest limiting factor for Google Wallet — besides the fact it only works on a few phones, and certain carriers tried to block it — was that it really only worked with one credit card, a Citi-bank issued Mastercard card. No more. It now works with all Visa, MasterCard, American Express, and Discover cards. This money-in-your-phone thing might have some legs.