There is a search option in the middle of the screen but I have never had much luck searching with it.
Good luck with your new way of eating. I'm not very familiar with South Beach but I have personally found that if my carbs are very low, and I eat protein and fat, the calories aren't an issue. It typically mutes my appetite to the point that I have trouble getting enough calories. I'm enjoying using Atkins 1972 as a guideline right now. It can be quite restrictive but it also lends itself to a great deal of appetite control.
You might like the food tracker on the Atkins site. I was surprised to see my macros when I started tracking my food.
Happy New Year!