Not sure if you've had the same experience as me but lately when I google for a technical problem related to development it seems I keep finding links to StackOverflow and those links seem to best address the reason I googled.
Turns out the team that created StackOverflow just got $6 million in VC from a dream-team of investors and are now accepting proposals for specific communities. Because their site does such an incredible job of surfacing the correct and relevant answers I'd love to see a Stack Overflow-like site for WordPress.
Turns out they require a significant number of people to sign on for supporting a proposed topic in order for them to be willing to launch a site (Find the heading "The New Stack Exchange Site Creation Process.") I'm hoping others here agree that Stack Overflow has been useful and would like to see one for WordPress too.
BTW, all content on their sites is CC licensed and available for download so Automattic could choose to repurpose the content on WordPress.org or WordPress.com. Hopefully the fact it's not part of http://wordpress.* won't keep those at Automattic from supporting this proposal.
P.S. We've already got 20 votes in 3 days which, according to the people at StackExchange is a good healthy show of support for a topic. Still, I think they need about 100 before they can feel confident that it would be worth the effort. Certainly a WordPress Answers Exchange would be well supported to please help out and vote this up! Thanks in advance.