If you don't follow Jazz Twitter, you probably missed the biggest (well, loudest, anyway) jazz story of the month. About three weeks ago, pianist Ethan Iverson of the Bad Plus published an interview with fellow pianist Robert Glasper on his blog. (Full disclosure: I've never spent serious time with either man's music, though Iverson and I follow each other on Twitter, and I saw him play with saxophonist Houston Person at the Village Vanguard last year.)