Download a site and save a mirror copy:

wget -nv -E -k -m -p http://www.whatever.com

Be sure to check robots.txt as it may not allow some folders to be accessed.

Update[2008-06-19]: If there are javascript generated images, CSS background images, they won't be saved.

Handy Joomla functions:

$user = new mosUser( $database );
$user->load( (int)$row->id );

mosMail($mosConfig_mailfrom, $mosConfig_fromname, $confirmEmail, $subject, $message);