However the one big difference is that the Show used the word "nigger" or more accurately "nigga" very often.  What to make of this?

I presume that most of the Cartoon Network's audience and thus the audience for Boondocks is White and generally young males.  The use of the word, which most newspapers won't print and I know of no one who has used in my presence, was said in a casual way hardly angry or pointedly as often seems to be the case in rap songs.  It would seem to me that it makes it more easy to accept the word.

If the show is a success won't it be soon before we hear more Whites use the word "nigger?"  What will the consequence be?  Will it represent a splint on generational grounds?

What is the meaning of its use by Blacks?  I am sure that every ethnic group has used the slur words used by others in an effort to take away their sting.  It is one thing for such a word to be used within the group than against the group.  But what happens when the group uses it so often?