I don't know exactly when they started, but WXKS-AM 1430 has begun broadcasting in IBOC HD (Stereo?). The sound quality of WXKS-AM itself remains about the same (not true of WBZ-AM or WMKI-AM) but hash can be heard over WVEI-AM 1440 Worcester and WNBP-AM 1450 Newburyport. This means that someone living half-way between Wellington Circle and Ferry St. Salisbury...let's say in, um, oh I don't know, Rowley, yeah that's it...who previously could expect to pick up WNBP unencumbered may have to listen to it through IBOC hash.