I found an Area 51 proposal for "Living with Diabetes," and followed. (I thought of it first, for what it's worth....)
The proposal needs followers and upvoted questions -- follow, ask questions, and upvote questions you'd like to see on the launched site!
For the record, I don't think that a Stack Exchange site would compete with Tudiabetes. I think they would compliment each other. Tudiabetes is a forum, mainly for discussion, whereas SE is for straight question and answer; discuss D issues here, ask and answer specific questions on SE.
Disclosure: I do not work for SE, though I am a satisfied user and a major fan of the SE model.