Bummer. The good news is there is a lot you can do to keep the disease under control or even prevent it. Google "Sugar Busters" and "Low Glycemic Recipes." The white pasta, bread, potatoes and fatty meats are going to have to go bye bye. But he can enjoy whole wheat pasta, whole grain breads, sweet potatoes, and you can find low-fat cuts of any type of meat you like. Add in lots of fruits and veggies and you guys won't miss any of those white foods.
I'd ask the doc if he can recommend a nutritionist. I think it helps to understand what certain foods do to your sugar levels. Good luck!