Man, I'd love to get a transcript of Rush's October 4, 2010 broadcast to see exactly what "derogatory comments about black people" she thinks he was making. I've never heard him say anything negative about Blacks that wasn't aimed squarely at liberalism, race-baiters, or the Black propensity to support the Left to their own detriment.
Maybe Trap can get it easily - I think he's a Rush member.