Android Central

Lest you read over it like, erm, some of us did, it's worth a mention that along with the official launch of Google Wallet in San Francisco and New York comes news that the service also has expanded to more creditors. American Express, Visa and Discover "have made available their NFC specifications that could enable their cards to be added to future versions of Google Wallet," according to Google's official blog post.

That means while you're still only currently able to use a Citi MasterCard (or pre-paid card), we should see more options in the future. Hopefully more locales will follow.

Source: Google