There's a new frozen yogurt shop in Addison, sweetFROG.
It's self-serve, with 14 flavors to choose from, and you get to pick all the toppings you want from their selection of 70 options. The price is based on the weight.
I've been in several times and I plan to go back. Often. I love frozen yogurt (froyo) shops that have a wet walnut topping!
Check out sweetFROG for yourself. They're located at 3750 Belt Line Road #118c, Addison, TX 75001 (near Einstein's bagels).
Their hours vary, so call first: 972-707-7039.