I am not sure I see how useful it is. I think people who would care about HTML5 are already aware of it and the ones who don't will probably not be influenced b

I am not sure I see how useful it is. I think people who would care about HTML5 are already aware of it and the ones who don't will probably not be influenced by the logo. What remains seems to just be some kind of nerdy bragging thing: collect them all! It reminds me of the "Netscape Now!" button campaign from the early web. The logo and badges looks nice tough.