BTW, I don't like at all that one community (programmers) have more sites to go hunt for questions / answers.
Who says programmers are one community, or are interested in only one thing?
I'm a programmer. I'm interested in the bottom line of the code. Developing the software. I have the pieces, I need to put them together to make them work. I enjoy digging into the code and writing software. As such, I find Stack Overflow to be immensely useful.
A colleague of mine is a programmer. He's interested in team dynamics and leading developers. He cares about how the department runs and wants to be a manager. He has all the resources and employees, he needs to put them together to make them work. Programmers is for him.
A friend of mine is a programmer. While many of us went to work after college, he stayed in school. He's finishing up his PhD and wants to be a professor. He loves theory and study. His code isn't always practical in the business world, but it is always interesting and thought-provoking. Theoretical Computer Science is his favorite Stack Exchange site.
And so on.
We are part of a vast and diverse profession. It's bad enough that non-technical people lump us all together as "the IT guys," we don't need to do the same thing internally.