http://www.dibonsmith.com/constel.htm
The Constellations: has the Greek myths for the classical constellations
and star information.
http://www.astro.wisc.edu/~dolan/constellations/
Stars and Constellations: each constellation is listed with an interactive
star chart, information on its position in the sky, and the names of the stars.
http://windows.ivv.nasa.gov/
Windows to the Universe: good background information on constellations and
myths, as well as lots of other relevant background.