Using Data::Dump to dump all the headers in your example you can see what keys to look for:

use HTML::HeadParser;
use HTTP::Headers;
use Data::Dump 'dump';

my $h = HTTP::Headers->new;
my $p = HTML::HeadParser->new($h);
$p->parse(<<EOT);
  # your header here!
EOT

print dump($p->header), "\n";

__END__
bless({
  title                  => "Mysite Title",
  "x-meta-description"   => "Homepage",
  "x-meta-distribution"  => "all",
  "x-meta-keywords"      => "word1,word2, word3",
  "x-meta-poc"           => "Mike Smith 111-111-1111",
  "x-meta-postdate"      => "20011220 ",
  "x-meta-resource-type" => "document",
  "x-meta-title"         => "Department C ",
  "x-meta-url"           => "http://www.mywebsitehere.com",
}, "HTTP::Headers")
[download]

All the keys start with 'x-meta' which is why nothing was printing for you. Checking the documentation for HTML::HeadParser I found:

X-Meta-Foo:
All <meta> elements will initialize headers with the prefix ``X-Meta-'' on the name. If the <meta> element contains a http-equiv attribute, then it will be honored as the header name.

You can find the docs by running perldoc HTML::HeadParser

Hope this helps...

gav^