My cardio was a little crazy....but like I've said, at this point, I wasn't afraid of a little muscle loss.
I did cardio 5-6x a week (mostly 6x) for 60 min AM and *sometimes* 30-45min in the evening. The evening cardio was only 1-3x a week, it was something I threw in there if my diet hadn't been great during the week. Lifted 3x a week.
Cardio was mostly machines - Precor Elliptical, Running (tread or outside), StepMill. Intensity was as hards as I could work for that time....so for 60 min I went as hard I could stand.
Calorie-wise, I don't know. I never pay atention to the machines, since they are so inaccurate. But I would guesstimate about 650-750 calories in an hour. Of course, as I lost weight, this number went down...since calorie burn is higher for the heavier people and lower for the lighter. And machines don't take into account muscle mass and/or afterburn effects.