There are a number of slightly dodgy looking internet TV services available but Zattoo is the first one which offers all the programmes from the five terrestrial channels online over and above 24 other satellite channels.
There a good mix of international news outlets as well with broadcasts from France and Russia with children programmes and special interest content like AutoMotoTV and the Poker channel
You will have to install a 17MB application before you can experience the thrill on online TV anywhere and register through the application.
Zattoo (opens in new tab) is available for Linux, Windows and Mac systems and you can setup your preferences using the option menu.
Interestingly, it works in a similar way to other services like Joost or Babelgum in that it is a peer to peer application and is based on the workings of Sugih Jamin and Wenjie Wang at the University of Michigan.
Surprisingly, Zattoo has a team of 50 people working on it worldwide and has plans to go big; The service is currently supported by advertising.
(Ed : IE7 reports that "There is a problem with this website's security certificate" when trying to register (opens in new tab)).