Run Wordpress using PHP 5.4's built-in server. This is an attempt to get routing working with Wordpress using PHP 5.4. It works for the non-admin pages. I'm still working on getting it working for Admin pages. It just doesn't reference the CSS properly.

.wprouter.php

<?php

$root = $_SERVER['DOCUMENT_ROOT'];
chdir($root);
$path = '/'.ltrim(parse_url($_SERVER['REQUEST_URI'])['path'],'/');
set_include_path(get_include_path().':'.__DIR__);
if(file_exists($root.$path))
{
  if(is_dir($root.$path) && substr($path,strlen($path) - 1, 1) !== '/')
    $path =     rtrim($path,'/').'/index.php';
  if(strpos($path,'.php') === false) return false;
  else {
    chdir(dirname($root.$path));
    require_once $root.$rootpath;
  }
}else include_once 'index.php';