Watch NASA-TV Live and View the Space Shuttle in Orbit
Yahoo! has done a great job in bringing the NASA channel and various space missions to the web. There is a stream of NASA-TV linked to Yahoo as well as various articles and followings in conjunction with Space.com.
This week, the Space Shuttle Discovery jumps into the heavens and can be seen, due to its low orbit and clear weather, from the Earth. Also, the ISS (International Space Station) will be visible as well. Check out the main Space Shuttle page on Yahoo! for more details.