# less /var/log/messages | grep "real memory"
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Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.10делается это очень просто:
$isiPad = (bool) strpos($_SERVER['HTTP_USER_AGENT'],'iPad');
RewriteCond %{HTTP_USER_AGENT} ^.*iPad.*$ RewriteRule ^(.*)$ http://ipad.yourdomain.com [R=301]