This Saturday, the Sugarhill Gang will be performing at the Missouri Black Expo at 5:15 p.m. (MC Lyte is on at 6:15 p.m.; the concert takes place at America's Center.) Kevin Johnson has a nice interview in today's Post-Dispatch with the group's Big Bank Hank Jackson. What isn't mentioned in the piece is this nugget that Keegan Hamilton discovered in the course of reporting a story about '80s hip-hop in St. Louis: that "Rapper's Delight" likely "broke" first right here in St. Louis. Read the exce