Hackers diet is good.. but very simplistic as far as diet information goes. Sure it's easy to model your body as calories in = calories out + weight change, but that's kind-of like modeling atoms as pure indivisible lumps of matter.... It gets you 80% of the way there (and that might honestly be enough for most people) -- but there's a whole world of nutritional science that it ignores.

Related note: http://alwyncosgrove.com/2010/01/hierarchy-of-fat-loss/ is probably the best summary of what to do on the exercise side..