I Guess you all know about this - I notice that John Stovall had pointed to the website.
But have you seen the iphone app!! The Massive Dev Chart
Last time I was developing my own film it was with two stop clocks and a lot of irritation.
This application makes it really really simple - Timers for every conceivable mixture of film and developer, with the numbers wobbling when you should be agitating.
Of course, I don't yet know how good the values are, but you can edit them, and it certainly revolutionises the hassle of development for me.
all the best