My pal Craig Davis, once lord of creativity at JWT, moved back to his native Australia to become Chief Creative Officer at Publicis Mojo — and launch the first web site to link advertising with idealism. Brandkarma.com asks: Oil spills, product recalls — can brands be a force for good? And then people around the world use the site to offer opinions, brand by brand. Now, as the ad world convenes at Cannes, Craig asks you to join — and influence — the conversation by sharing just six words. He asks: With resources imperiled in an increasingly crowded world, what matters most to you? There’s a little box at the top of the screen. Think, type, hit send. And thanks.