on a side note, http://l2.io/ip.js is pretty cool. since it allows script injection into the return, it can be used clientside to inject their ip into the webpage. Pretty cool if you're posting from static html to a 3rd party form.

<script type="text/javascript" src="http://l2.io/ip.js?var=document.getElementById(ip1).value...;

works where item ip1 is where you want to IP address to end up on the client html.