One of my bosses "forced" me to sign up and use Stackoverflow.com, so yeah.
I do find this really useful though.
Q&A for professional and enthusiast programmers
Q&A for user experience researchers and experts
Q&A for WordPress developers and administrators
Q&A for enthusiasts and power users of the Android operating system
Q&A for linguists, etymologists, and serious English language enthusiasts
Q&A for professional programmers interested in conceptual questions about software development
Q&A for members of the workforce navigating the professional setting