ldr_-_feed_filter.user.js

// ==UserScript==
// @name           LDR - Feed Filter
// @namespace      http://github.com/to
// @include        http://reader.livedoor.com/reader/
// ==/UserScript==

var FILTERS = [
	function(c){
		if(/zLLQDaZE3hGdsj811ZzWFw/.test(c.feedlink))
			c.title = c.feedlink.replace(/.*username=(.*)/, 'Soundcloud: $1');
	}, 
];

addBefore(unsafeWindow.Subscribe.Model.prototype, 'load_data', filter);

function filter(list){
	FILTERS.forEach(function(f){
		list.forEach(f);
	});
}

function addBefore(target, name, before) {
	var original = target[name];
	target[name] = function() {
		before.apply(this, arguments);
		return original.apply(this, arguments);
	}
}