Offered here are a number of links.
Please respect their material by following any copyright restrictions they might have.These links may be from organizations that are based on the skills, reputation and charisma of an individual or group.

It is TaiQi.com's opinion that there is no "best TaiQi" or "only way" to practice Acupuncture, TaiQi or Taoism.
Be wary of those who might offer THE answer to all life's questions.
Remember, "That which can be defined is not the Tao.".

a link to links about taichi-chuan: http://www.soton.ac.uk/~maa1/chi/others/links.htm

A good resource for articles and links: http://taichi-chuan.net/taichi/articles/article.html

A nice video clip of taichi chuan from a german site. I don't know the style but the subtitles are a good description. Go to the middle for the short little clip of the small guy doing pushhands!
http://clip.wu-taichi.com/

Link to more links: http://www.scheele.org/lee/tcclinks.html - -this one should keep you busy for a few weeks.

about some speculation on the Yin and Yang: http://www.chinesefortunecalendar.com/yinyang.htm

When observing the cycle of the Sun, ancient Chinese simply used a pole about 8 feet long, posted at right angles to the ground and recorded positions of the shadow. Then they found the length of a year is around 365.25 days. They even divided the year's cycle into 24 Segments, including the Vernal Equinox, Autumnal Equinox, Summer Solstice and Winter Solstice, using the sunrise and Dipper positions. They used six concentric circles, marked the 24-Segment points, divided the circles into 24 sectors and recorded the length of shadow every day. The shortest shadow is found on the day of Summer Solstice. The longest shadow is found on the day of Winter Solstice. After connecting each lines and dimming Yin Part from Summer Solstice to Winter Solstice, the Sun chart looks like below. The ecliptic angle 23 26' 19'' of the Earth can be seen in this chart.

Some Wikipedia references:
about acupuncture: http://en.wikipedia.org/wiki/Acupuncture
about the Taichi http://en.wikipedia.org/wiki/Taichi
about the exercise: http://en.wikipedia.org/wiki/Tai_Chi_Chuan
a nice little site from Australia: http://www.acupuncture.com.au/

for practitioners and students:

Al Stone invented Acupuncture.com and now he runs Gancao.net
This Seattle school (SIOM) has some great articles: http://www.siom.edu/resources
ITM ONLINE is a great resource for students and practitioners. Here is the page for acupuncture. http://www.itmonline.org/arts/acuintro.htm