1. 3 columns–WordPress uses Themes and there are literally hundreds (maybe thousands) of Themes to choose from. Here’s some 3-column Themes.
2. Subcategories–are easily created when you specify a Parent Category in the Admin -> Manage -> Categories panel.
3. Recent Postings – could be handled via a Theme or via a Plugin.
4. Recent Comments – could be handled via a Plugin.
5. Decent Security – You must login to WordPress to manage a site. Also, Roles and Capabilities control what users can and can’t do.
Yes and there’s so much more…
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1. There are themes around
2. Yes
3. With plugin (different around)
4. With plugin (different around)
5. There are some, but be more specific in your requirements
