Video on demand service Vudu has broken the streaming video surround-sound barrier, debuting a 7.1 Dolby version of "Pirates of the Caribbean: On Stranger Tides." More than 30 films with 7.1 sound are coming to Vudu, according to provider Dolby Laboratories. The online streaming audio format is called Dolby Digital Plus 7.1 -- "a sophisticated, … [Read more...]