Nope, I didn't make it to the Ironman finish line.
I stopped after the first of 2 loops of the run course at about 13:00 hours - even with 4 full hours to go I didn't think that I had enough energy left to walk it in, after a fairly tough first two legs.
I still think I made the right decision this morning - especially after hearing the details of someone drowning in the swim. (He may still be hanging on today, but it sounds like with major brain damage).
I can't think of any major mistakes that I made - I was just exhausted.
Details of the race to follow in a few days....