Stack Overflow just opened its public beta today (or rather, yesterday). I've been reading Jeff Atwood's blog
Coding Horror for a while and had been interested in the concept, so I took a look around when I saw his announcement.
The goal of the site is to be a community managed repository of good answers to specific questions related to programming... to eventually eliminate having to find answers by sifting through tons of crap on various forums and other such sites. People ask questions, other people answer those questions. Both the questions and answers can be edited like a wiki to make everything as clear, understandable and correct as possible. And answers can be rated, so that eventually the best answers will be at the top and it will be easy to see what the community considers the best among all the other proposed solutions.
There seems to be a huge amount of activity on there, which is great. The reputation system whereby you get more and more powers on the site as you gain reputation from having your questions and/or answers up-voted seems like a good thing, even if it tends to encourage some people to throw up an answer that isn't really the best quickly in hopes of getting the first up-vote(s) or even getting the answer accepted for extra rep.
I was encouraged to get an account (or rather, use my existing Yahoo account as an
OpenID) when I saw a question that I had a good answer too. My answer to that question has been rated up a couple times and got a couple comments of "great answer". That really made me *glee*... deep down, I'm a praise whore.
Anyway, I think this site has a ton of promise and I'm really excited about it. I hope to contribute to it and use it to find answers to my questions a lot in the future.