Identicon

HTML

<script src="http://francisshanahan.com/identicon5/jquery.identicon5.js"></script>
<script src="http://www.webtoolkit.info/djs/webtoolkit.md5.js"></script>
<ol><li>071e3f61671e790fc492b583a01ae22b</li></ol>

<div id="mydiv"></div>

<div id="unicornify"></div>

CSS

#mygravatar {margin: 10px}

JavaScript

//{"ip": "68.61.155.207", "address":"68.61.155.207"}
//http://jsonip.appspot.com/

//http://unicornify.appspot.com/avatar/ad97b577f331ae29ed90da5751f2e44f?s=128

$.getJSON("http://jsonip.appspot.com/", function(data) {
    var ip=MD5(data.ip);
    $("#unicornify").html("<img src='http://unicornify.appspot.com/avatar/" + ip + "?s=128'>");
    $("#mydiv").html("<ol><li>" + ip + "</li></ol>");
    $('li').identicon5({size: 128});
});