Sweet Island also does Dairy Free yogurt which helps many Celiac customers. Lots of coupons available. Many toppings in tamper proof no touch dispensers.
Sweet Island has been open for 2 months now and they have gone above and beyond to make thing gluten free friendly! All of the frozen yogurt is GF! They have many of their toppings in individual, enclosed dispensers so there are no worries that your Chocolate Chips are contaminated with someone elses gluten filled cookies. The owners also have been willing to work with me to ensure things are GF and reduce the risks of cross contamination. In the event that you have concerns, like I did when they first opened, the staff and owners were willing to speak with me, show me their prep area, offered me fresh toppings straight from the back (so there is no risk of cross contamination), showed me labels, and generally put my mind at ease. I have eaten here probably 15 times since they opened September 2012, and have had only great and positive experiences!