Gary,
I am married to a Type I diabetic, and I sincerely and strongly urge you to seek the counsel of a Diabetes Educator and an Endocrinologist, not a regular RN or Doc. The difference is amazing. My wife has had Diabetes since age 11 and is now 47 and under the care of the right folks finally after a near fatal accident due to a low blood sugar episode. The incident was caused by the previous MD changing her insulin type and regimen and NOT relating all the facts about the speed in which it would drop the blood sugar level.
If your health care plan will cover the expenses, I urge you also to investigate insulin pumps with the continous glucose monitoring capability. This is cutting edge technology and is proving to be the best thing my wife has found as far as control. However,(always a caveat)this is some major expensive stuff, $10K + not including all the reccuring monthly accessories. Some insurance plans won't cover this yet.
Best of Luck to your son and to you as well.