Replying to The N-word

First, this is what sparked my interest:

http://www.cnn.com/2007/US/02/24/nword.conference.ap/index.html

So, what do you think? Do you use the word? Is "nigga" a different word that inscribes a new context? Should some people be allowed to use it, and others not? Is it even relevant in our society today? Is it dead? Is it racist?