**Update:** I don't have time to fix it at the moment and have also come to doubt the sustainability of this approach since putting it online, so I tagged it as obsolete.

----------
This is a very basic user script which does the following:

* Checks the [Review][1] homepage if there's anything you can review

  * If so, it changes the title to `(`_`n`_`) old_title` where _`n`_ is the number of review tasks you can perform
  * If not, it refreshes the page in 15 seconds

This is the script:

<!-- language: lang-js -->

	// ==UserScript==
	// @name        Review Stalker
	// @namespace   http://camilstaps.nl
	// @description Stalks the StackExchange review pages
	// @include     https://*stackexchange.com/review
	// @include     https://*stackexchange.com/review/
	// @include     https://stackoverflow.com/review
	// @include     https://stackoverflow.com/review/
	// @include     https://serverfault.com/review
	// @include     https://serverfault.com/review/
	// @include     https://superuser.com/review
	// @include     https://superuser.com/review/
	// @include     https://askubuntu.com/review
	// @include     https://askubuntu.com/review/
	// @version     1.1
	// @grant       
	// ==/UserScript==

	var RS_reviews_avail = 0;

	function RS_parseInt(string) {
		var got_decimal_point = false;
		var divider = 10;
		var result = 0;
		for (var i = 0; i < string.length; i++) {
			var char = string.substring(i,i+1);
			if (char >= '0' && char <= '9') {
				if (!got_decimal_point) {
					result *= 10;
					result += parseInt(char);
				} else {
					result += parseInt(char) / divider;
					divider *= 10;
				}
			} else if (char == ',') {
			} else {
				return -1;
			}
		}
		return result;
	}

	function RS_hasClass(element, cls) {
		return (' ' + element.className + ' ').indexOf(' ' + cls + ' ') > -1;
	}

	var RS_numbers = document.getElementsByClassName("dashboard-num");
	for (var RS_i = RS_numbers.length - 1; RS_i >= 0; RS_i--) {
		if (!RS_hasClass(RS_numbers[RS_i].parentNode, "dashboard-faded")) {
			var int = RS_parseInt(RS_numbers[RS_i].getAttribute('title'));
			RS_reviews_avail += int;
		}
	}

	if (RS_reviews_avail) {
		window.setTimeout(function(){
			document.title = "(" + RS_reviews_avail + ") " + document.title;
		}, 300);
	} else {
		window.setTimeout(function(){
			window.location = window.location;
		}, 15000);
	}

  [1]: https://stackoverflow.com/review