Tai Chi has not seen the same growth, but is slowly becoming more available to the average curious Westener. In most cases, it is less physically taxing than Yoga, and is more meditative in that one does not spend most of the hour or so huffing and puffing and wobbling about. The movements emphasize control and fluidity and it really is a beautiful art. A site that has helped us here at SheerMind is Tai Chi for Beginners.net. You'll find videos, written instruction and a lot of general wisdom.