1. Sign up for a Google Checkout account
2. Fill out a Google Docs Spreadsheet
3. Set up and insert you gadget
I haven't tried this yet but I am thinking about making an online store based on Blogger using this gadget. The gadget is embeddable anywhere in the site or blog and "No complicated coding or technical tasks are required," says Google on the gadget's homepage. "You can get your first online store up-and-running in under five minutes." I guess those Mommy bloggers like my wife who are planning to earn some extra cash out of selling things online would find this gadget very helpful. More on this later :)