It's very easy to participate. Just write in your hand, a one-word feeling about being touched by diabetes and take a picture of yourself. Once that picture is uploaded to Flickr, you can choose for it to be part of the group (you need to join our group before you do that).
It doesn't matter where you take the picture. It can be in your kitchen, office, garden, who cares? just tell the world how you feel and help spread awareness about Diabetes.