Links to Cool Sites
The American Radio Relay League
This is the national organization for Amateur Radio in the USA. There is a wealth of information about ham radio there.
This site is primarily devoted to people who like to observe satellites, and you can find out when and where to look to see the International Space station and other satellites. There is also a lot of other good astronomy info here.
NASA Astronomy Picture of the Day
This site has a vast archive of really great astronomy pics from the Hubble Space Telescope and other sources.