I managed to get 10,000 steps yesterday...this score does include Bikram yoga, but it doesn't give many steps because we're basically standing on the mat or laying down. I'm absolutely crazy about the fitbit; thank you for this thread which motivated me to purchase it!
The calorie count for Bikram was very different than the Polar FT4, but I expected that. Calorie counts for treadmill walking and Leslie dvds have been much more accurate, which makes perfect sense, actually.