Heather- You can have a tall non-fat sugar free latte for 1 dairy.
I get a venti iced americano and then put anywhere from 4-8 oz skim milk in and count as a dairy.
The new fruity light frapps in a tall are in the 100-160 calorie range. I have a handout from my COD for our state fair food that says the light caramel or mocha are 185 cals. and count as a starch and a condiment.
So you do have lots of choices, just make sure you get non fat, sugar free, no whip on everything.
When I was doing Atkins, I would get everything with full fat 1/2 and 1/2 instead of the milk. Sooo creamy and yummy, but ooohhh soooo much fat!!!