PHP script to auto create all the various iOS icons based on only 1 image. This requires ImageMagick to run http://www.imagemagick.org/script/index.php

createIcon.php

<?php
$filename = $argv[1];//get the command line argument which is supposed to be the png filename
echo "Going to iconize \"$filename\"\n";

class imgFile
{
  public $fileName;
	public $size;
	public function __construct($fileName, $size)
	{
		$this->fileName = $fileName;
		$this->size = $size;
	}
}

$imgArray = array(
    new imgFile("Icon-72.png","72x72"),
    new imgFile("Icon-Small-50.png","50x50"),
    new imgFile("Icon-Small.png","29x29"),
    new imgFile("Icon-Small@2x.png","58x58"),
    new imgFile("Icon.png","57x57"),
    new imgFile("Icon@2x.png","114x114")
);

$dest = "BugMath2/Resources/";//This is the path of where your iOS icon files are to reside
foreach ($imgArray as $img)
{
	//echo "$img->fileName $img->size\n";
	$size = $img->size;
	$fileName = $img->fileName;
	$str = "\nCreating $size size of icon";
	echo $str;
 	$response = shell_exec("convert $filename -resize $size  $fileName");
 	if (is_null($response) == false)
 		exit("\nError at creating icon of $size");
 	else
 		echo "\nSuccess in creating icon of $size";
	
	echo "\nCopying $fileName over to $dest";
	shell_exec("cp $fileName $dest");
	echo "\n========";
}
?>

To use, just type "php createIcon.php someimage.png" and just sit back and grab a beer