Did you know that recently on Ustream it is possible to watch live streaming from some cameras installed on International Space Station (ISS)? many cameras are also sending HD video. I made up a web page on my website where you can watch the two streams (HD and not HD) and live ISS position on a map.
The webcams are not always working, but most of times they are, and if you are lucky you can see an astronaut passing there.
Good vision.
http://www.romaeurmeteo.it/webcam_iss.html