iTunes app store.user.js

// ==UserScript==
// @name           from iTunes app store to appspot.com
// @namespace      http://web.zgo.jp/
// @include        http://*
// ==/UserScript==
(function(){
	window.addEventListener("load", function(e){
    var aTags = document.getElementsByTagName("a");
		var urls = /http:\/\/itunes\.apple\.com\/WebObjects\/MZStore\.woa\/wa\/(.*)$/ig;
		for (var i=0; i<aTags.length; i++) {
			var href = aTags[i].href;
			aTags[i].href = href.replace(urls, "http://app-store.appspot.com/?url=$1");
		}
	}, false);
})();