Update: Here is the entire code:

#!/usr/bin/env perl
use strict;
use warnings;
#BEGIN {
#    $| = 1;
#    open (STDERR, ">&STDOUT");
#    print qq~Content-type: text/html\n\n~;
#}

use CGI;
use CGI::Cookie;
use CGI::Carp qw(fatalsToBrowser);

use DBI;
use DBD::Pg;
use LWP 5.69;
use HTTP::Request::Common qw( POST );
use HTML::Entities;

my $buffer = "";
my $name = "";
my $value = "";
my @pair;
my $key;
my $cookie;
my $test;
my $session;
my $query;


#$main::cookies = $main::session->cookie(-name => 'NCWiFiTest',
# Set username
$main::session = new CGI;
$main::cookie = $main::session->cookie(-name => 'User-Name',
    -value => 'todd',
    -domain => 'localhost',
    -path => '/',
    -expires => '+1d'
    );
$main::cookie->bake;
print "<hr>\n";

$main::query = new CGI;

$main::test = "";
$main::test = $main::query->cookie(-name => 'User-Name');
print "User Name --> $main::test\n";
print "<br>";
print "<hr>\n";

foreach $main::key (keys %ENV) {
print "$main::key --> $ENV{$main::key}<br>";
}

print "End of environment<P>";

# Get the input
read(STDIN, $main::buffer, $ENV{'CONTENT_LENGTH'});

# Split the name-value pairs
@main::pairs = split(/&/, $main::buffer);

foreach $main::pair (@main::pairs)
{
    ($main::name, $main::value) = split(/=/, $main::pair);

    # Un-Webify plus signs and %-encoding
    $main::value =~ tr/+/ /;
    $main::value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;

    # Stop people from using subshells to execute commands
    # Not a big deal when using sendmail, but very important
    # when using UCB mail (aka mailx).
    $main::value =~ s/~!/ ~!/g;

    # Uncomment for debugging purposes
    print "Setting $main::name to $main::value<P>";
}

exit;
[download]

The call returns (in opera) with the following values set:
HTTP_COOKIE --> User-Name=todd
HTTP_COOKIE2 --> $Version=1

Live HTTP Headers (in Firefox) shows:
Set-Cookie: User-Name=todd; domain=localhost; path=/; expires=Wed, 08-Aug-2007 02:49:15 GMT Update: I tried using CGI::Simple::Cookie. This works, the only change noted is that the header includes "Cookie: " instead of "Set-Cookie: ". I will investigate this further.