I found this 'new' brand at Winn-Dixie yesterday, and it's called "Too Good" Greek Plain yogurt. The large containers were going for $5 each.

For 3/4 of a cup, there is only 3g of carbs, 2g of those being sugar.

This stuff is pretty darn good, if you like plain Greek yogurt. I add sf drink mix powder to it to flavor it, or some sf strawberry syrup from Torani's line of sf syrups.