gistfile1.js

// ==UserScript==
// @name           Ars User Admin Link
// @namespace      ars
// @include        http://civis.arstechnica.com/users/1
// ==/UserScript==

// Add jQuery
    var GM_JQ = document.createElement('script');
    GM_JQ.src = 'http://jquery.com/src/jquery-latest.js';
    GM_JQ.type = 'text/javascript';
    document.getElementsByTagName('head')[0].appendChild(GM_JQ);

// Check if jQuery's loaded
    function GM_wait() {
        if(typeof unsafeWindow.jQuery == 'undefined') { window.setTimeout(GM_wait,100); }
    else { $ = unsafeWindow.jQuery; letsJQuery(); }
    }
    GM_wait();

// All your GM code must be inside this function
    function letsJQuery() {
        var pattern = /^\/users\/(\d+)/;
        var match = pattern.exec(location.pathname)
        if(match.length > 1){
            $('#body h2')
                .append(" (<a href=\"http://write.arstechnica.com/mt.cgi?__mode=view&_type=author&id=" + match[1].toString() + "\">User Admin</a> )");
            $('#body h2')
                .append(" (<a href=\"https://spreedly.com/arstechnica/subscribers/" + match[1].toString() + "\">Subscription Admin</a> )");
        }
    }