I have not tried it, but from what I have read, it emphasizes that weight loss/control is a simple measure of burning more calories than you take in.  \n\nIt's available online for reading (http://www.fourmilab.to/hackdiet/www/hackdietf.html).  I also found a blog of someone who tried it (http://www.metagrrrl.com/metagrrrl/2004/08/progress_on_the.html).  \n\nGood luck!
What's the Hacker's Diet?