This is a slight modification of a script I found at PHPFAQ :

   1  class Password
   2  {
   3  	static function generate($length)
   4  	{
   5  		srand((double)microtime()*1000000);
   6  
   7  		$vowels = array("a", "e", "i", "o", "u");
   8  		$cons = array("b", "c", "d", "g", "h", "j", "k", "l", "m", "n", "p", "r", "s", "t", "u", "v", "w", "tr",
   9  	    "cr", "br", "fr", "th", "dr", "ch", "ph", "wr", "st", "sp", "sw", "pr", "sl", "cl"); 
  10  
  11  		$num_vowels = count($vowels);
  12  		$num_cons = count($cons);
  13  
  14  		$password = '';
  15  		
  16  		for($i = 0; $i < $length; $i++)
  17  		{
  18  			$password .= $cons[rand(0, $num_cons - 1)] . $vowels[rand(0, $num_vowels - 1)];
  19  		}
  20  
  21  		return substr($password, 0, $length);
  22  	}
  23  }

To use it try this code:

   1  require 'password.php'
   2  
   3  echo Password.generate(10);

It will spit out passwords that are semi-pronouncable.

   1  ssh-keygen -t dsa
   2  ssh-copy-id -i ~/.ssh/id_dsa.pub user@server

OS X doesn’t come equipped with ssh-copy-id but you can download the script from here.