If you haven’t heard about it, Stack Overflow is the new baby of Jeff Atwood and Joel Spolsky. The concept is as simple as it can be: creating the most massive programming FAQ in the world. Questions are asked, answers are given, and the best answers appear on top.
I was in the private beta of this site, and I can be a witness that this works really well. Never was there a forum or a newsgroup in which I asked a question about programming and received good answers so quickly. Also: the simple-yet-clever UI of Stack Overflow can teach all a meaningful lesson. This is how web-sites should be built.
The public beta has launched today, so go ahead and give it a try.