We'd already guessed that tomorrow's Google event would be all about contactless payments, and we can now confirm that the system will be called Google Wallet and launch later this summer. We can also confirm that Google's lined up several retail partners including The Container Store to get things off the ground -- it sounds like special NFC readers will arrive in stores sometime around September 1st, and customers will be able to pay just by tapping their phones against them. That's all we know for sure right now -- but we're sure to find out far more about device support and additional retail partners tomorrow during our liveblog.