Islet cell transplants are what it's called, if you google it you'll find out about it. The problem is that the person being transplanted will attack the new cells and wipe them out too.
There is some other research into a "vaccine" (I don't really think it's that specifically, but it's used to try and prevent it) for TB. It's been around for 80's years, so health trials with it are already proven and it is taking very little time to develop and it's really cheap!http://www.thecrimson.com/article.aspx?ref=522838
If they can stop the destruction of the islet cells then you can transplant a patient and monitor the specific T cells that kill them and keep them from mounting the immune response in the first place. I'm not sure but it seems the real break through is in monitoring the specific T cells, they have to be pheresed out and measured to find the exact dose of the TB vaccine that works for each individual. They've known about the vaccine, T-cells, and type 1 for years now but they couldn't figure out individual doses that worked for everyone. Now they can monitor the T's they are right on the doorstep of curing type 1!!!!