This is a well-trod path long overdue for a roadway of its own. Webcasting and other forms of online broadcasting are growing by leaps and bounds. We need a domain for broadcasting stations of all kinds. The system of call names for radio and TV stations has been around for decades and provides a ready-made check on naming conflicts, up to a point. Added benefit of warding off visitors from low-tech areas who will know in advance that they lack the hardware to visit such a site.
Newspapers normally have a name too similar to local geography to escape duplication.