The first time I saw something about Stack Overflow was while I was reading Joel on Software. Couple days ago I finally created my account there and started using it. So far my impression has been very positive.

Stack Overflow is basically just a question-answer site for software developers. But because of its active user mass good questions are replied rapidly and bad ones are moderated. Users receive more privileges the more they are writing good questions and answers.

What is a good question or answer then? That is up to other users who can vote, edit or close your entry.