Tholos, named after a type of circular ancient Greek temple, consists of a large round screen. The London Tholos would be linked to an identical one in Vienna. Through them, people in both cities will be able to see and hear each other in real time. The cylindrical structure contains technology that simultaneously transmits and receives high definition live moving images. People standing in front of London's Tholos would see a wrap-around picture of the scene in Vienna. At the same time, a similar London image is displayed in the Austrian capital. Citizens in both countries would be able to face each other and talk via an array of directional microphones and loudspeakers. There are ambitious plans to expand the system into a network linking at least 16 European cities by 2008, and then others in North America and Asia. from Smart Mobs

Update oktober 22, 2003: The company hopes to mount Tholos systems in landmark locations in six European cities: London; Vienna; Paris; Rome; Warsaw, Poland; and Copenhagen. Link to Wired Artikel and link to Tholos Systems: