Josh Bitossi, a young developer from Austraila has made the first ever chat-codes related app for iPhone/iPad/iPod!
Get it here:
http://itunes.apple.com/au/app/facebook-emoticons/id496836592?mt=8
Josh Bitossi’s webpage:
http://www.facebooksmileyshq.com/view-all-smileys/
You can see how it works in this video update: