IDG World Expo is considering moving Macworld Expo out of New York and back to Boston due to rising rent costs at the Javits Center where the conference takes place, according to the New York Post, as noted by MacCentral . Macworld Expo was moved from Boston to New York five years ago. IDG is seeking a few years of free rent at Boston’s new convention center, which is expected to be completed in 2004, and guaranteed hotel rooms.