Make Wikipedia work on 2012-01-18.

unSOPA.wiki.user.js

// ==UserScript==
// @name        Un-SOPA Wikipedia
// @namespace       http://mjball.github.com
// @description     Make Wikipedia work on 2012-01-18.
// @include     http://*.wikipedia.org/*
// ==/UserScript==

(function ()
{
    function unSOPA()
    {
        $(function ()
        {
            var i = setInterval(function ()
            {
                if ($('#mw-sopaOverlay').remove().length)
                {
                    clearInterval(i);
                    $('body > *').show();
                }
            }, 100);
        });
    }
    
    var script = document.createElement("script");
    script.textContent = "(" + unSOPA.toString() + ")();";
    document.body.appendChild(script);
})();