I need to be enlightened about Black Numenoreans
 

I tried researching them, but I didn't find too much so I decided to ask the experts. I need to know as much about them as possible for a fan fic I am writing. Any information would be awesome super fantastic. Thanks.

I believe the Black Numenoreans were the people of Numenor who were corrupted by Sauron's influence when he hald dominion over Ar-Pharazon, the king.
One in particular, the Mouth of Sauron, was a decendant of those, who had landed on Middle-Earth before the sinking of Numenor.

Hope this helps a bit!

Don't forget Fuinur and Herumor! famed leaders of the Haradrim during the Last Alliance...

This doesn't say much more than what's already posted, but it gives some more information on certain factors of the topic:

http://www.glyphweb.com/arda/

On left toolbar go to "Bs" and click "Black Numenoreans."