It's always great to find a well thought-out Blog on Tai Chi Chuan, and this is a good one.
Dr. Melissa Smith has a PhD. in English Literature with a specialization in Shakespeare, Renaissance drama, and early women writers. The posts I read are clear, informative and obviously well written. Some of the posts currently up include a very detailed study of osteoarthritis, Melissa's take on Taoism, and a piece on the development of Kung Fu animal forms.
Here's a great video Melissa included of a Kitten in slow motion showing why the ancients tried to capture that powerful animal energy in their Kung Fu:
Dr. Melissa Smith trains with Dr. Christopher Young in Hamilton, Ontario Canada.
Check out "Tai Chi With Melissa" at this link.