code:

// ==UserScript==
// @id             jerkikosnewtabs
// @name           jerkikosnewtabs
// @version        1.0
// @namespace      
// @author         
// @description    
// @include        [url]http://forums.somethingawful.com/*[/url]
// @grant          GM_openInTab
// @run-at         document-end
// ==/UserScript==
var forum = document.getElementById("forum");
if (forum)
{	
	var button = document.createElement("a");
	button.href = "#";
	button.innerHTML = "Open New Posts in New Tabs";
	button.style.cssFloat = "right";
	button.style.marginRight = "8px";
	button.addEventListener("click", NewPostsInNewTabs, false);

	var where = document.evaluate("THEAD/TR/TH[contains(@class,'title')]",
			forum, null, 7, null);
	where = where.snapshotItem(0);
	if (where)
	{
        
		where.insertBefore(button,where.firstChild);
	}
}

function NewPostsInNewTabs(event)
{
	var eval, node, name;
	event.preventDefault();
	eval = document.evaluate("TBODY/TR/TD/DIV/DIV/A[contains(@class,'count')]",
			document.getElementById("forum"), null, 7, null);
	OpenTabLoop(eval);

	return;
}

var i =0;
function OpenTabLoop(eval){
	if (i < eval.snapshotLength){
		setTimeout(function(){		
			node = eval.snapshotItem(i);
            node = node.href;
			i++;
			OpenTabLoop(eval);
            GM_openInTab(node);
			
		},(i*3)+250);
	}

}