Sorry to be so delighted, but I think it's great that there's a place in the forum for this!
I have Grave's (2002), colitis (2011) and now T1 as of this month. Grave's is dealt with for the most part as I had my thyroid treated with radioactive iodine in 2002 (no function anymore, it's now just a little 'raisin' as one doc described it). The colitis is kind of an ongoing struggle which I can sometimes keep in control with the specific carbohydrate diet (basically low-carb except from veggies and a few sorts of beans). Now with T1 I'm feeling naturally more inspired to be low-carb and I feel like I can do that without missing too much.
Anyway, like I said, I'm quite happy to see other people with autoimmune hat-tricks. I felt like a bit of a freak when they diagnosed me with T1 on top of the other illnesses :/