Not quite the same thing, but Wiscon had a panel discussion on how white people can talk to other white people about racism, so that people of color won't have to do all the work of educating. Not, or not just, because some white people are more likely to listen to another white person, but because the more people doing this work, the more of it may get done. (I think there are specific cases where white people will listen more readily to other white people: one is if the person calling them on something is a relative or close friend, someone they're inclined to listen to.)