This will force all the links at MetaFilter.com sites to open in a new tab, even internal links.
// ==UserScript==
// @name ALL THE LINKS in new windows
// @namespace http://www.onfocus.com/
// @include http://*.metafilter.com/*
// @version 1
// @description This will force all the links at MetaFilter.com sites to open in a new tab, even internal links.
// ==/UserScript==
(function(){
var script = document.createElement("script");
script.type = "application/javascript";
script.innerHTML = "$(function(){$('a').attr('target', '_blank');});";
document.body.appendChild(script);
})();