Nmaginate, I must admit that I tried to join this organization ASCAC earlier this year when I moved back to NY. However, I have yet to get a response from them and their regional office is only about 30 mins from where I am currently living. I didn't get a warm fuzzy feeling from them.
But the other two links you've provided are great and I'm going to add another link so that anyone who wants to go to this site can. They offer GREAT links and test on your knowledge of black facts.
http://www.blackconsciousness.com/Our people have made the mistake of confusing the methods with the objectives. As long as we agree on objectives, we should never fall out with each other just because we believe in different methods, or tactics, or strategy. We have to keep in mind at all times that we are not fighting for separation. We are fighting for recognition as free humans in this society
Malcolm X, 1965