There is a good thread on the Atkins board about full fat yogurt.
THe organic plain yogurt I found had a thick layer of cream on top that mixed into the yogurt -wonderful stuff.

THe cultures in the yogurt reduce the carbs to an acceptable level. A single splenda packet makes it sweet or the natural state is a great tart taste. And portion control is easier. I added kool-aid to try different flavors(those really needed a sweetner packet) I've have issues giving up all dairy and I am not doing well at keeping to 3oz of cheese. Munster goes down too easy.