As good as Google Wallet might be for payments, youve so far been locked into using one Google account; thats not so hot if a family member needs to borrow your phone to send some cash. That wont be an issue after today, since Google has updated Wallets Android app with a tweaked interface that lets you use multiple Google accounts. Youll also get shipment updates for orders from distant retailers.Theres also an under-the-hood upgrade that should affect other apps you use.