Little is known about Matt the Cat, but rumor has it that he disappeared right around the same time the Russians sent up Sputnik in 1957. He left his Boston home with nothing but a stack of rhythm and blues records and a bag of 100 proof cat nip. He still orbits the earth, rockin' the XM satellites as music director for The '50s - XM 5. Listen for his rhythm and blues show, Harlem, which airs several times weekly.