Images from here.
I read about this yesterday but couldn't find any photos of the kits. Long story short, before the start of stage 20 Team Radioshack put on custom black kits to bring awareness of the 28 million people living with cancer, but they had to change back to their original kits before the race could start. On the podium at the finale of the tour Team Radioshack broke the rules again and donned the custom black kits.
After it's all said and done, this will be Lance Armstrong's lasting legacy. Not that he won 7 Tour de France titles, but bringing awareness to the millions of people living with cancer though cycling and his Livestrong programs.