I figured out the problem. Thanks for all the no-help, tech support.
Either the OS comes with Apache installed by default; or when Webuzo is installed, it installs Apache. I think the latter because if you install Webuzo on a clean system and then inspect 'All Installs,' Apache is one of the couple dozen listed.
Here is the problem. On Linux Apache serves content out of /var/www/html. When the @*#$776% Webuzo installs a program, it puts it in /home/username(yours)/public_html/app-name. For example, it installs PmWiki in /home/username/public_html/pmwiki.
You can't get to it. Apache won't serve it because it is looking in /var/www/html. You can't type the path in the URL line because, I'm thinking, an outside user (hello, Chrome, et al) is forbidden to access those directories.
If anyone knows a fix for this, please inform me. Otherwise, I AM DEFINITELY REPORTING THIS AS A BUG!