Google has announced the Google Wallet Card - a new physical card that allows Google Waller users in the US to spend from their Google Wallet accounts at MasterCard accepting merchants without having to transfer their balances into their bank accounts. The card is free but must be ordered from Google by the user.
An FAQ about the new Google Wallet Card says that "the Google Wallet Card is accepted at millions of MasterCard locations. Choose either credit or debit at checkout, and if you're prompted for a PIN, enter your Google Wallet PIN." Google also noted that "You cannot use the Google Wallet Card outside the US right now."