A consortium wants to use TV signals to serve up big “datacasts”. WaveExpress is already testing data broadcasts in select locations. Of course this only works one way, so a phone hookup for “up” is needed. TV folks hope this technology, wrapped around TV content, can give them back the eyeballs they’ve been losing to the Internet. A TV signal takes up 5 megabits of digital television’s 19.4 megabits downstream, so that extra bandwidth is being licensed from various stations as they upgrade to DTV.