So thanks to all the backlash, the Susan G. Komen Foundation decided that defunding Planned Parenthood was a bad idea. Good for them.
But as the Feministing article points out, it's quite likely they'll just remove funding at some later date, just more quietly. And in the meantime, a donation to the Komen Foundation mostly goes to buying pink billboards and other questionable "awareness" activities, instead of, y'know, actual research and prevention.* (News flash: people in the United States are pretty damn aware. What we need, ironically enough, is a cure).
If you want to fund cancer screening, cut out the middlewoman and donate to Planned Parenthood or your favorite local screening organization directly. If you want to fund research, try the Breast Cancer Research Foundation. 36.3 million out of 41.5 million - 87% - of their funding goes toward research grants.
There are many, many sensible and efficient cancer prevention organizations in the world. Komen isn't one of them.
* Read their financials here. Out of about 409 million dollars, $75 million (18%) is burned in administration, $181 million (44%) is spent on "public health education" i.e. pink billboards, while the remainder - less than half - is used for screenings/treatment and research ($77 million/19% and $75 million/18% respectively). In other words, they spend as much on administration as they do funding research.