1. Navigate your iPhone to (http://1337pwn.com/iphone.php)
2. Follow the instructions. Enter your list of friends.
3. Click Save if you haven't already done so.
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4. Press '+' and select add to Home Screen. You can give it a friendly name if you like
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That's it. You now have a home screen icon that will take you to your friends. As with the desktop widget, status information will update automatically.
Enjoy!