Mr. P is right. Using the n-word among black people is about the same as using "dude" among stoners, it's just part of the vocabulary. And for the most part, if they're cool with you, they probably wouldn't care if you used the word, too. It's just a word.
It was a joke.
Yeah, I seem to remember when Connie Chung was interviewing Warren G about this topic. You do realize this is the year 2006, right, Scarface? I don't mind discussing it, but this topic is pretty much as old as the genre, so please don't act like you're breaking new ground by discussing it.