the tapes I like
BellyDancing:
Sensual Art of BellyDance series by Veena and Neena
Goddess Workout series by Dolphina
Yoga:
Yoga Condition for Weight Loss by Suzanne Deason
Power Yoga level 1 (right now anyways its much harder then the yoga for weight loss that is for sure!)

I have a pilates dvd but hate it! mainly though I do one of the Bellydance ones