The firing of Radio jock Don Imus is a positive step in American media. There is an implicit belief that if you have a sizable audience you can get away with pretty much anything. Don Imus and the like have been doing this for years and getting away with it. Hopefully, this will deter other radio hosts from mouthing offenses on air.
On the one hand it is great that both MSNBC and CBS took the final step of dropping the otherwise popular radio host. On the other it is disappointing that they did so only after extreme pressure from advertisers and minority groups. At some level it was probably just economics at work and not a genuine concern for offensive radio talk.