I have just started the 5:2 diet there is loads of information online - here are a few :
the book http://thefastdiet.co.uk/
the horizon program that kick started it http://vimeo.com/54089463
a free forum http://www.52fastdiet.co.uk/
a review http://www.thenational.ae/lifestyle/well-being/the-fast-diet-we-try-it-out-and-give-you-the-lowdown
I am using fitday to track my progress.
Anyone want to join me ?