The question is, are Wikis the best answer to this problem? They're really very good at helping us categorize things that are very differentiable, and very definable. For example: The Hundred Years War make a good article in a wiki. "How to raise angel investors" does not. Instead, people write articles about it, and you take what you want out of them.
Why don't we start with an HN faq, much like the Reddit programming faq [http://code.reddit.com/wiki/help/faqs/programming], and if that's successful, we can build from there. My philosophy is: address specifically the problem that you (or someone) has (i.e., "I have questions, and don't know where to begin!"), because spreading out too much or being too ambitious can literally kill a project. Don't take my word for it: the svn guys talk about how those sorts of projects were the "worst" parts of SourceForge: [http://code.google.com/events/io/2009/sessions/MythGeniusPro... <-- somewhere in there]
So let's start with a specific need and address that. Once again, I'd be happy to help you if you elect to go forward, but we need to attack one thing at a time.