It seems like the major business pubs are usually far behind when they run stories about technological innovation: But this Business Week story does a nice job of looking at the inefficient way that spectrum is used today. The story describes smart antennas, mesh networks, and software-defined radios as technologies that can make better use of existing spectrum in the future. I'm surprised, however, that the writer didn't mention ultrawideband technology because it's a technology that doesn't require just one specific frequency band.