Re: What's the difference between Wiki and Articles?
Articles might be best used for information that has a time component, as news headlines do, and as traditional "broadcast" information rather than as a collaborative effort. This is the way the feature is set up to display information: with the date given prominently, the number of reads specified, etc. There's a strong "recent news" feeling to them. Of course, you could use Articles for background information or other non-time-specific content, but then there's less reason to use them rather than wiki pages.
Wiki pages might be best for information whose publication date isn't so important. Also, Articles are more like traditional "one-way" publishing, with reader participation limited to leaving comments. Wiki pages are more interactive (depending on how you've set up permissions), and can be worked on collaboratively. They are less "one-way" or "top-down" and more "two-way" where readers and authors are less strictly defined. But these are big generalizations, and what you use depends on how you want to present information at the site, what your readers/users are familiar with, etc.
-- Gary
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