Google Wallet now supports all major credit cards
Phandroid

A newly released update for Google Wallet now allows users to use credit or debit cards from any one of the world's four major vendors to pay for merchandise. Whether you want to use Visa, Mastercard, Discover, or American Express to pay for your stuff, you may now do so with the use of only Google Wallet and your Android-powered mobile phone. Google has also introduced a remote lock feature that will let users disable devices that they no longer wish to use for future transactions. The update is available now for free through the Google Play Store.

What Else You Need To Know:

- Google Wallet is an innovative way of paying for merchandise with the use of credit or debit card information and Android smartphones.

- The option to pay for merchandise with the use of Google Wallet's prepaid virtual debit card feature is still available.

Other sources

This is great for those who’d rather not go through the hassle of adding cash to their virtual prepaid debit card just to use Google Wallet. - Quentyn Kennemer, Phandroid  
Droid Life
Google Wallet Update Allows You to Add Any Credit or Debit Card (Updated)
Phandroid
Google Wallet update adds support for all credit cards
Android Police
Google Wallet Updated To Support All Major Credit And Debit Cards, Goes Cloud Based
Engadget
Google Wallet moves to the cloud, opens up to all credit and debit cards
AndroidSPIN
Google Wallet updates, links to your debit or credit cards Now
Mobile Burn
Google Wallet adds more payment options, tightens up security features
Other
Google Wallet Just Got A Huge Update That Lets You Use Any Major Credit Card (GOOG)
Other
Google Wallet Now Supports Any Debit Or Credit Card
PhoneDog
Google Wallet gains support for all credit and debit cards as well as remote disable
Mobile Crunch
Google Wallet’s Huge Upgrade Adds Support For All Credit/Debit Cards, Remote Disable Feature
 
More...