Find Your Tai Chi is a very nice resource. If you pay a visit, you'll find something like 150 (and growing) links to video clips, articles, blogs, websites, DVDs, ... you name it.
For example, here's Cheng Man Ching demonstrating his sword form.
Ten thousand flowers in spring, the moon in autumn, a cool breeze in summer, snow in winter. If your mind isn't clouded by unnecessary things, this is the best season of your life.
~ Wu-men ~