Sprint and Google are now bringing out the first GWK74 “Google Wallet Update” exclusively for the Samsung Nexus S 4G on Sprint. Take it from the horses mouth Google has blogged about the update process saying it may take some time for everyone with a Nexus S 4G with Sprint to get the update.  They said via Google Blog:

“When we announced Google Wallet, we pledged a commitment to open eCommerce enviroment. We appreciate Citi and MasterCard for being our launch partners. And today, Visa, Discover and American Express have made available their NFC specifications that could enable their cards to be added to future versions of Google Wallet.

Our goal is to make it possible for you to add all of your payment cards to Google Wallet, so you can say goodbye to even the biggest traditional wallets. In fact, we’ve got a video of our first customer, someone who is ready to replace his famously over-stuffed wallet. We hope Google Wallet gives him “serenity now.”

This is still just the beginning and while we’re excited about this first step, we look forward to bringing Google Wallet to more phones in the future. You can learn more about Google Wallet at google.com/wallet.”