Yoke Chin with Grandmaster Huang Sheng Shyan (Master Huang Xingxian)

Gin Soon Tai Chi Chuan Federation - Two Man Set

This is pretty much the same as I learned from John Kells although with a softer yielding emphasis

Master Chungliang Huang - Centering Meditation

Master Chungliang Huang - Tai Chi Meditation

Tai Chi Secrets Elbow Power

Aligning with Gravity

Great and informative post about aligning with gravity.

This can be found on the Slanted Flying website. Read the full post on aligning-with-gravity-in-taijiquan

The leg figure 8 pattern

This is a great exercise. I do something similar with kicks using a figure 8 pattern.