WordCamp San Francisco 2008 badges will be printed with your Gravatar image. Check out Andy’s sweet mockup to see what it will look like.
Be sure your Gravatar email matches the one you use for registration, and have your image ready to go before August 14. If you haven’t already, try uploading a higher res image, up to 512×512 pixels. Then use the badge checker to see what it will look like.
Those without a Gravatar will have an identicon printed.