The Google Wallet service has just gotten an update, and it's the most important update yet.
When Wallet originally launched, users could only add a Google Prepaid Card or Citi MasterCard for NFC payment, leaving basically everyone else in the dust. Of course, you could add funds to your Google Prepaid Card with whatever card you liked, but that was often viewed as complicated or defeated the purpose of a truly-integrated wallet.
Today, Google has announced on its Wallet site that users of the Wallet app could now add any Visa,