First version that adds realtime filtering of middlecoin addresses.

Middlecoin utilities

// ==UserScript==
// @name	Middlecoin utilities
// @namespace	http://middlecoin.com/
// @version	0.1
// @description	Some extras for middlecoin, i.e. table search filter
// @match	http://middlecoin.com/
// @copyright	2012+, KamiNuvini
// @run-at	document-end
// @require	http://code.jquery.com/jquery-2.0.3.min.js
// ==/UserScript==

// Realtime address search
$('table').before('<div id="searchbox"><b>Search address: </b><input id="search" type="search"></div>');

// Search snippet, thanks to dfsq at StackOverflow - http://stackoverflow.com/questions/9127498/how-to-perform-a-real-time-search-and-filter-on-a-html-table
var $rows = $('table tbody tr');

$('#search').keyup(function() {
    var val = $.trim($(this).val()).replace(/ +/g, ' ').toLowerCase();

    $rows.show().filter(function() {
        var text = $(this).text().replace(/\s+/g, ' ').toLowerCase();
        return !~text.indexOf(val);
    }).hide();
});
// End of realtime address search