Gordo has a page on his website which I consider Mandatory Reading for anyone considering making a change to their diet. I have used it with many people in the last 3 years. Just in case anyone hasn't read it here it is.
The only problem I personally will have with your S B R in one day idea is that I will not be able to easily split it up in to 3 different time slots. I don't have access to a shower at work so a run during lunch is out. I will have to try and find the closest pool, I could see an early AM bike, a lunch swim with an evening run.
If I could make that happen 1 day a week I could do a long ride on Sat AM with a follow up ride Sat PM and a bike - run brick Sun AM (90) and PM (60). I will still need to pick up another swim but it should work out pretty well.
I am getting ready for vacation which means no lifting for 10 days, just swimming and easy running. I am pretty stoked. I will be laying out my training schedule while I am away and plan on starting 2 weeks from now. Thanks for lots of great ideas in this thread.
What we think, or what we know, or what we believe, is in the end, of little consequence. The only thing of consequence is what we do. -John Ruskin