I really love the Amnesty International iPad ad, created by TBWA Berlin. It does a great job of using the touch screen technology that iPad is built on, and using “TORTURE DISAPPEARS ONLY WHEN YOU DO SOMETHING ABOUT IT.” tag line.
Under one minute and extremely effective and memorable. It’s proof that you don’t need to oversell a mission as great as Amnesty International and you don’t always need a long story to get the point across.