adds a nice RT button to the tweet action buttons that allows you to instantly retweet a post

retweeter.js

ReTweeter = {
	initialize: function() { 
		$(".status").each(function(count,status) {   
			var actions = $(status).find("td.actions div"); 
			var link = $("<a/>").attr({href:"/home/?status="+ReTweeter.reTweetOf(status)});
			link.append( $("<img/>").attr({src:"http://railslove.com/rt.gif", alt:"REtweet this"}) )
			link.bind("click",function(e){
				e.preventDefault();           
				var status = $(this).parents(".status");
				$("#status").val(ReTweeter.reTweetOf(status));       
				$("#status").trigger("click");
				$("#status").trigger("focus"); 
				$("#doingForm").trigger("submit"); 
			});
			actions.append(link);                    
	 	});
	},
	authorOf: function(status) {
		return $(status).find("td.status-body div strong a").text();
	},
	textOf: function(status) {
	 	return $(status).find(".status-body div span.entry-content").text().replace(/^\s+/, '').replace(/\s+$/, '');
	},
	reTweetOf: function(status){
		return ("RT @" + ReTweeter.authorOf(status) + ":" + ReTweeter.textOf(status)).substring(0,139); 
	}
}
ReTweeter.initialize();

retweeter.user.js

// RETweet
// version 0.1 BETA!
// 2008-11-14
//
// --------------------------------------------------------------------
//
// 
//
// --------------------------------------------------------------------
//
// ==UserScript==
// @name          ReTweet
// @namespace     http://railslove.com
// @description   Adds a nice RT button to the tweet action buttons that allows you to instantly retweet an post
// @include       *twitter.com*
// ==/UserScript==

var head = document.getElementsByTagName("head")[0];
var script = document.createElement("script");
script.src = "http://railslove.com/retweeter.js";
script.type = "text/javascript";
head.appendChild(script);