I for one, thought that it was quite positive thing and I respect his decision to take his own life. It was very well thought-out suicide note; I think most people are quite baffled by it because of the degree of author's rational explanations, extreme honesty and empathy for others in spite of his own pains.
Also, he unintentionally perhaps shed light on programming which a lot of us could relate to,
At times growing up I would feel inconsolable rage, but I never connected this to what happened until puberty. I was able to keep the darkness at bay for a few hours at a time by doing things that required intense concentration, but it would always come back. Programming appealed to me for this reason.
I thought that if I got into to a good college, or a good grad school, or lost weight, or went to the gym nearly every day for a year, or created programs that millions of people used, or spent a summer or California or New York or published papers that I was proud of, then maybe I would
feel some peace and not be constantly haunted and unhappy. But nothing I did made a dent in how depressed I was on a daily basis and nothing was in any way fulfilling.
Like Bill Zeller, I retreated into programming at an early age to right a wrong and while programming is a lot of fun; I hid behind a screen to escape personal problems that I thought that the coding marathon high, money & prestige would solve. And the more fun programming got, the worse the issues got and the more I dived into my rabbit-hole.
This is not to take away anything from Bill Zeller; he is an incredible brave man alive and dead. Anyone who went to Trinity knows that it's a very hostile environment for coming out. The fact that he kept coding software then and beyond and kept a completely normal pretense is incredible to me. And I want to thank him for his iTunes ripping software, his inspiration to me when I was at undergrad and his brutal honesty in his suicide note.