I had the great pleasure to meet Krista Dong and Zinhle Thabethe from iTeach who are at the frontlines of treating and preventing AIDS in South Africa, the epicenter of this global crisis. These amazing, committed and inspired women talk about their daily experience working with people with HIV and AIDS in Kawazulu Natal and how they think mobile phones could exponentially scale their work. As Krista says, "To deal with the scope of this problem, to even begin to make a dent, we need new ideas, crazy ideas. And everyone, everyone has a cell phone." Watch if you want to hear from frontline workers how mobile phones can revolutionize their social change work.