Ok … I figured out the problem. For some reason, WordPress v3.0 did not come with a “default” theme located in:
wordpress/wp-content/themes/default/
So when my site tried to render itself, it barfed because that folder wasn’t where it was supposed to be. Seems like a pretty big goof on WordPress.
Anyway, my site is back up and working great. Thanks to all who came to help.