Well, I did it. They've had their armful, so that's it for 4 months. I opted for a nice sweet clementine for afters, though the biccies were tempting. No ill effects, though I did need an early night.
To any of you T2s who are NOT on insulin, if you email your list of drugs/doses to the website, the doctors there will tell you whether they can safely take your blood. The issue is more about YOUR safety, less about the potential recipient's.
Though I haven't read up on organ donation recently, I do know that most people are suitable donors for corneas and skin for grafting even if the internal organs are not.