Finally!!!!!!! I have Awstats working!!!!!!!

The undefined fastcgi parameter is a result of using ENV in the cgi-bin.php So I replaced ENV with SERVER and it works!!!!! So with Ubuntu 11.10 (64-bit), Awstats, and Nginx 1.05 the cgi-bin.php looks like this (where it now reads $_SERVER....it used to read $ENV):

<?php
$descriptorspec = array(
0 => array("pipe", "r"), //stdin is a pipe that the child will read from
1 => array("pipe", "w"), //stdout is a pipe that the child will write to
2 => array("pipe", "w"), //stderr is a file to write to
);

$newenv = $_SERVER;
$newenv["SCRIPT_FILENAME"] = $_SERVER["X_SCRIPT_FILENAME"];
$newenv["SCRIPT_NAME"] = $_SERVER["X_SCRIPT_NAME"];

if (is_executable ($_SERVER["X_SCRIPT_FILENAME"])) {
$process = proc_open($_SERVER["X_SCRIPT_FILENAME"], $descriptorspec, $pipes, NULL, $newenv);
if (is_resource($process)) {
fclose($pipes[0]);
$head = fgets($pipes[1]);
while (strcmp($head, "\n")) {
header($head);
$head = fgets($pipes[1]); }
fpassthru($pipes[1]);
fclose($pipes[1]);
fclose($pipes[2]);
$return_value = proc_close($process); }
else {
header("Status: 500 Internal Server Error");
echo ("Internal Server Error"); }}
else {
header("Status: 404 Page Not Found");
echo("Page Not Found"); }
?>