I saw her workout on Fit TV, too - I'd been wondering about it for awhile, too. Although I don't have any advice about her w/o, if you're interested in a great yoga dvd that can be really challenging, check out Shiva Rea's Yoga Shakti. You might find it to be more of a workout than the Ivanhoe dvd might be ... especially if you are used to Cathe! It has 3 workouts on it, but you can use the "Matrix" to create your own workouts (from very short/upper/lower body splits - to up to 3 hours - enough down/up dogs, etc. for a moderate cardio w/o), like Cathe's workout blender. I got mine on Amazon ...
Erica