South Beach Diet is like a friendlier version of the Atkin's Diet (The no-carb diet), and it's a book by Dr. Arthur Agatston.
It's trying to create a lifestyle change, not just a diet and it contains 3 phases. "Good carbs" are allowed such as the ones found in veggies, whole wheat etc.. But South Beach dieters must say goodbye to potatoes, fruit, bread, cereal, rice, pasta, beets, carrots, and corn for the first two weeks (Phase 1). After that, some of these foods remain strongly discouraged. This is to get rid of cravings for it later on, of course when you move on, you can still indulge, but not so much in the overly processed ones. He claims that within the first two weeks you'll lose about 8-15 lbs to jump start your weight loss. (But that varies, dependent on how much you weigh when you first start, less if you're not overly overweight). Phase 2, you're re-introduced to some carbs (not all) and fruit, and you stay on this phase until you reach your goal weight, the weight loss is slower during this phase though. There's also a list of foods to avoid during this phase as well, but less restrictive than the first phase. Then lastly is Phase 3, which is what you should be following after you've reached your goal as a lifestyle change. It's a diet for life. Eat normal foods in normal portions, following a few basic guidelines.
The South Beach Diet bans unhealthy fats, but strongly promotes healthy ones. It doesn't count grams of carbs, but encourages dieters to go for low-sugar carbs, or those with a low glycemic index (they don't cause the blood sugar levels to rise and fall as quickly).
So far, it's been really effective! So effective that I don't want to move from phase 1... which I should really move on from, it's just not possible to totally live without carbs