Interesting that you bring this up Lee as I was planning on starting a version of this known as the 5:2 method. About 3 weeks ago my wife and I watched a program on the Nebraska public television called "Eat, Fast & Live longer by Michael Mosely which was an hour long program about this type of diet. After seeing the show and the fasting results it convinced me to give it a whirl. My only problem is I kinda like to eat.
But I'm gonna try it. In Michaels method a male is to consume only 600 calories or less on the 2 consequtive fasting days or 500 calories for women. Ok, so I thought fasting meant eating nothing. But on this 5:2 method fasting is eating only 600 calories (for me) 2 days in a row. That is better than starvation for 2 days in a row. I believe I can do it with 600 calories a day. We will see how it goes. On his show Micheal was splitting his 600 calorie meal up into 2 meals. One at breakfast and the other half in the evening. Thought that 2 small meals might make it a bit easier to stomach. I see he has some postes about it here:
http://thefastdiet.co.uk/author/michael/
His book about it is called "The Fast Diet". Haven't read it yet.