This year's chance to get your Houston gangsta rap on with Bun B—the living half of utterly bomb '90s gangsta duo UGK—is tonight at Neumo's. Why we want to go: radio darling Bun B's releasing II Trill on April 29, and we definitely want to hear the new material. He's got a track record of collaborating with mainstream rap's hottest new artists (2005's Trill featured such names as the late Pimp C, Jay-Z, and Scarface),......