You could support World Health Day by adding a twibbon to your avatar during the week of 7 – 11 April 2010! You may support any other cause from political and charitable to sports and technology brands. Twibbon is the easiest and most powerful way to promote awareness of your cause on Twitter. The social networking service spreads awareness about your cause by overlaying a small icon onto your supporters’ Twitter profile avatars to create a ‘Twibbon’, making an impactful online statement. The user’s Twitter account automatically tweets to let everyone know about their affiliation.