I first read about this on Professor Tracey's blog and she was not very complimentary on it. I understand because she is a self described "Hip Hop Junkie" and feels that Cosby hates it. I don't think that he hates all of rap, just the examples that he has heard which are vulgar, misogynistic and just plain bad. I think that he needs to hear the more powerful and uplifting forms of hip hop to help balance his perspective.
Any way I think Mr. Cosby's foray into hip hop is a good one. He isn't rapping on it for one and second he is spotlighting hip hop acts that rap about positive subjects like education and respecting women. (Which I guess just confirms what I said in the previous paragraph) Third he and his musical collaborator will incorporate musical forms like jazz into the tracks.
The album is scheduled to come out in May. I for one can't wait to go and buy it.