Dan Kamisky has fixed color for the color blind with this app he built for the iphone...I love the story on how he came up with the idea (from his site):
'So, we’re in Taiwan, building something…amusing…when we go out to see the Star Trek movie. Afterwords, one of the engineers mentions he’s color blind. I say to him, these fateful words:
“What did you think about the green girl?”
He responds, with shock: “There was a green girl??? I thought she was just tan!“'