I meant to post this link earlier, this is a company that makes zero calorie salad dressings. The dressings I've tried (Balsamic, Italian, Caesar) are all really great, I was surprised to see they were zero calories and made with all natural ingredients.
http://www.waldenfarms.com/products/dressings.htmll
They also have a number of sweet sauces and syrups. I've not tried those, I detest the flavour of artificial sweeteners and it seems most of those products use splenda.
These are carried in my local Stop & Shop market, I'm not sure what their distribution is otherwise.