On Capitol Hill and at the FCC’s headquarters in SW Washington, a debate is still going on as to whether cell phones are a substitute for old-fashioned landline service. But at American University in NW Washington that debate is just about over: the university has announced that there would be no landlines in dorm rooms starting this fall. The Washington Post has a good story on this, detailing the triumph of wireless at AU and other college campuses around the country. AU’s experience also says a lot about why AT&T and MCI are being folded up. According the the Post story, while AU made hundreds of thousands on long-distance service five years ago, the school last semester made… $1,109.