On Friday evening, September 5, 2008, the networks will donate one hour of primetime for a history-making interactive television special, uniting the nation as we Stand Up To Cancer. Stand Up To Cancer wants to raise money for cancer research-it seems cancer isn’t getting the press that it used to. So the Big Three Anchors- Katie Couric, Brain Williams, and Charles Gibson have joined forces to spread the word. I caught them on The Today Show and Good Morning America. ABC’s Good Morning America featured Robin Roberts, who is a cancer survivor, doing the interview with the three anchors. It…