Engadget - Is there such a thing as revolutionary technology? Many Egyptians believe there is. A year ago, they used mobile phones, social networking and banned TV channels to spread word of the protests in Tahrir Square. Hearing the news, thousands of young people risked their lives to join in and overthrow the dictator Hosni Mubarak. To mark the revolution's anniversary, Engadget caught up with five Caireans of different ages and backgrounds to find out about the gadgets they use to keep in touch with their world. For the love of freedom, democracy and at least one bar of mobile reception.