Ethan Zuckerman tells the story of his college roommate, Kurt Shaw, who has been working with the group Pé no Chão (“Feet in the Dirt”) to help street kids express themselves through breakdancing, capoiera, grafitti, beats and MC’ing. The group has just released “City of Rhyme,” a compilation of “a dozen street rappers, boys and girls who work, live, and play on the street and who use rhyme as a way to understand and change their world.” The tracks are freely available for download and licensed with a CC attribution 2.5 license, which means in the words of Zuckerman, “pass them around, remix them, play them – these are kids who deserve to be heard.”