Designers have Dribbble, Behance, etc. Businessmen have LinkedIn. HN is nice for simple article links but is hardly a robust network. Where are the social networks for programmers/hackers?
I don't see the need for that either; I'm referring to sharing things in a more visual way (Pinterest), making new code available (Github), adding friends and likeminded folks (Facebook), discussing topics in groups (LinkedIn).
The obvious answer to why is, no one's built it yet. Forrst supposed fill the showing off things in pictures void (plus it's exclusive, just like Facebook used to be). Github comes pretty close, you can even have a personal page (though updating has be done via pushes).
A feature I'd like to see in such a site is a repository/tool for defining syntax rules & colorschemes for editors.
Do they need it? There are twitter, reddit, HN, irc, stackexchange, Github, and facebook itself. Why programmers & hackers need special social network if they can interact with many networks?
That's obvious. Programmer is somebody who create source code. Hacker is someone who learn alot about IT stuff and knows multiple times more than typical coder. Someone who can solve real problem. Programming is a craft, hacking is an art.