The Acumen software design blog provides you with helpful articles about Joomla.

Several web sites provide a good overview.

Official Joomla Overview

Joomla Wikipedia

Joomla Security Vulnerability

One of the Joomla sites we host recently fell victim to a hacker attack. We implemented a couple of simple changes for common hacks and suggest that anyone else hosting a Joomla 1.5 site do the same. Hack 1 There is a default Super Administrator…