According to the Google Checkout site…
- From November 8 through December 31, 2006, we’ll process all of your Checkout transactions for free, even if you aren’t an AdWords advertiser. If you’re already an AdWords advertiser, we’ll process your Checkout transactions for free regardless of what you spend on AdWords.*
- Valid Checkout orders you receive during the promotion will automatically qualify.
- There’s no limit: we’re processing all of your Checkout sales for free.
- You can take full advantage of this promotion by encouraging your buyers to use Google Checkout on your site.