Then a Miracle Occurs - Public Beta - Blog - Stack Overflow:

stackoverflow.com is now live and open to the public, as a public beta.

I am very encouraged, what they've put together appears very well thought out and I hope will crush the "experts exchange" issue where you google a problem only to find out your answer may (or may not) be behind their curtain. Let's all make SO the new first source for those hard to answer questions. (And it wouldn't hurt, if you have an expertise, to subscribe to questions in your field of excellence and answer a few).