Google has been uploading lots of Google I/O session videos to YouTube. In one of those sessions (below), Google introduced new Google Wallet Cloud APIs.
"There have been exciting developments in the world of Payments at Google as we move forward with our digital wallet, and we have new APIs to share with you," the description explains. "Come and join us as we kick off the Commerce track at Google I/O 2012 with Peter Hazlehurst, Global Head of Product Management, Payments."
In the video, Google introduces the Save To Wallet APIs.
The session is just over a half hour long, so it's not too long, and if you're planning on using Google Wallet from the developer standpoint, you should probably give it a shot: