Among the most noteworthy performances at Lollapalooza 2006 were the biggest hometown shows ever performed by the two most successful rappers Chicago has produced -- Common and Kanye West -- and the first appearance here by French-Latin giant Manu Chao, a heroic figure in the Latin music community. Unfortunately, the crowd of about 50,000 that watched West perform was almost exclusively white, and hardly a mirror image of his hometown or his fan base. And many Latin music fans felt excluded from Chao's show and hurt by a contract that prohibited him from performing elsewhere in the city during his...