There are so many web sites that the real problem is finding a way in which to limit the number of sites upon which you depend.  There are many rich sources of information on the web as well as web sites dedicated to religious bigotry, hate, and other manifestations of the dark side of religion and human nature. 

   The richest gateways to the study of religions are:

1. the Wabash Center:
http://www.wabashcenter.wabash.edu/internet/front.htm

2. The American Academy of Religion 
http://www.aarweb.org/