As a healer I use the zodiac all the time
I am listing a few sites that I personally find useful but there are many more
Zodiac-wikipedia fine site very useful
good for calendars showing compatibility of each sign with others
Travel china guide.com chinese zodiac i find it extremely useful
I suggest anyone doing serious research uses both chinese and standard zodiac charts

a potted history by myself lol

we have always been influenced by the zodiac our star sign defines who and what we are. The daily alignment of the planets and stars plays a role in what we achieve each day. The sun and moon playing principle parts.
Nowadays there is a tendency to call it hocus pocus.
astrology has always played a big part in the royal courts in years of yore a country never went to war without consulting the resident astrologer
most kings and queens consulted daily as do many famous business men even today
Never dismiss the power of the stars and Zodiac lightly it will turn and bite you when you least expect it

have fun researching this fascinating subject