Ok, I might have slept on this one. But hopefully you haven't!
BlakRoc is the result off magnificent rock duo The Black Keys teaming up together with a numerous of dope rapartists such as Ludacris, RZA, Billie Danze, Raekwon and Mos Def to name a few.
You should really check out their self entitled album from 2009 or at least these great tracks from that album.
Also check out these tracks from The Black Keys latest album Brothers
First song "Tighten Up" produced by the genious mind of Danger Mouse