Each Burger King has its own pricing, but we have found that most of them offer a single cheeseburger, a double cheeseburger, and a triple cheeseburger. Normally the triple is often up to 50% less expensive than buying 3 cheeseburgers! Since we're going to throw away the bread anyway, it's really QUITE a deal.
They also have a grilled chicken. I often see it served with a caesar dressing, but simply ask them not to put that on the chicken.
Get an iced tea with it, and you've got the perfect low carb meal!
UPDATE: Burger King has begun to offer bunless burgers as a normal menu item, and even offers a low carb meal plan!
Burger King Offers Bunless Burgers
Restaurant Reviews for Low Carb Dieters
Tips for Eating Out on an Atkins Diet
500 Low Carb Recipes
Buy from Amazon.com
Lisa Shea's Library of Low Carb Books