PHP GMAIL Contatos Analisando XML com DOMDocument e cURL

O que estou tentando obter atualmente é apenas o atributo de gd: email, que é o "endereço =", e nada mais no momento. Que eu posso chegar na parte xml, diabos eu posso até ter qualquer pensamento por dizer, contanto que esteja dentro das tags, mas para obter o atributo de qualquer um, como no meu caso .. Estou completamente confuso. Eu costumava saber como fazer isso, mas faz tanto tempo desde que fiz algo que não era simples para o uso de XML. então eu estraguei tudo sozinho ..

<?xml version='1.0' encoding='UTF-8'?>
    <feed xmlns='http://www.w3.org/2005/Atom' xmlns:openSearch='http://a9.com/-/spec/opensearchrss/1.0/' xmlns:gContact='http://schemas.google.com/contact/2008' xmlns:batch='http://schemas.google.com/gdata/batch' xmlns:gd='http://schemas.google.com/g/2005'>
        <id>[email protected]</id>
        <updated>2011-06-30T00:07:48.706Z</updated>
        <category scheme='http://schemas.google.com/g/2005#kind' term='http://schemas.google.com/contact/2008#contact'/>
        <title type='text'>Taco Bells's Contacts</title>
        <link rel='alternate' type='text/html' href='http://www.google.com/'/>
        <link rel='http://schemas.google.com/g/2005#feed' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full'/>
        <link rel='http://schemas.google.com/g/2005#post' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full'/>
        <link rel='http://schemas.google.com/g/2005#batch' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full/batch'/>
        <link rel='self' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full?max-results=5'/>
        <link rel='next' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full?start-index=6&max-results=5'/>
        <author>
            <name>Taco Bell</name>
            <email>[email protected]</email>
        </author>
        <generator version='1.0' uri='http://www.google.com/mate/feeds'>Contacts</generator>
        <openSearch:totalResults>90</openSearch:totalResults>
        <openSearch:startIndex>1</openSearch:startIndex>
        <openSearch:itemsPerPage>5</openSearch:itemsPerPage>
        <entry>
            <id>http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/base/0</id>
            <updated>2010-01-27T00:11:57.430Z</updated>
            <category scheme='http://schemas.google.com/g/2005#kind' term='http://schemas.google.com/contact/2008#contact'/>
            <title type='text'>Taco B</title>
            <link rel='http://schemas.google.com/contacts/2008/rel#edit-photo' type='image/*' href='http://www.google.com/mate/feeds/photos/media/xxxxxxxxxxxxxx%40gmail.com/0/8_XL_JoAPon1k7SNixI2iA'/>
            <link rel='http://schemas.google.com/contacts/2008/rel#photo' type='image/*' href='http://www.google.com/mate/feeds/photos/media/xxxxxxxxxxxxxx%40gmail.com/0'/>
            <link rel='self' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full/0'/>
            <link rel='edit' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full/0/1264551117430000'/>
            <gd:email rel='http://schemas.google.com/g/2005#other' address='[email protected]' primary='true'/>
        </entry>
        <entry>
            <id>http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/base/1</id>
            <updated>2007-08-01T18:02:04.410Z</updated>
            <category scheme='http://schemas.google.com/g/2005#kind' term='http://schemas.google.com/contact/2008#contact'/>
            <title type='text'></title>
            <link rel='http://schemas.google.com/contacts/2008/rel#edit-photo' type='image/*' href='http://www.google.com/mate/feeds/photos/media/xxxxxxxxxxxxxx%40gmail.com/1/1B2M2Y8AsgTpgAmY7PhCfg'/>
            <link rel='self' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full/1'/>
            <link rel='edit' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full/1/1185991324410001'/>
            <gd:email rel='http://schemas.google.com/g/2005#other' address='[email protected]' primary='true'/>
        </entry>
        <entry>
            <id>http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/base/2</id>
            <updated>2010-01-27T00:11:57.430Z</updated>
            <categor,y scheme='http://schemas.google.com/g/2005#kind' term='http://schemas.google.com/contact/2008#contact'/>
            <title type='text'>Steve Sattler</title>
            <link rel='http://schemas.google.com/contacts/2008/rel#edit-photo' type='image/*' href='http://www.google.com/mate/feeds/photos/media/xxxxxxxxxxxxxx%40gmail.com/2/1B2M2Y8AsgTpgAmY7PhCfg'/>
            <link rel='self' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full/2'/>
            <link rel='edit' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full/2/1264551117430000'/>
            <gd:email rel='http://schemas.google.com/g/2005#other' address='[email protected]' primary='true'/>
        </entry>
        <entry>
            <id>http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/base/3</id>
            <updated>2010-01-27T00:11:57.430Z</updated>
            <category scheme='http://schemas.google.com/g/2005#kind' term='http://schemas.google.com/contact/2008#contact'/>
            <title type='text'>Michael Montana</title>
            <link rel='http://schemas.google.com/contacts/2008/rel#edit-photo' type='image/*' href='http://www.google.com/mate/feeds/photos/media/xxxxxxxxxxxxxx%40gmail.com/3/1B2M2Y8AsgTpgAmY7PhCfg'/>
            <link rel='self' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full/3'/>
            <link rel='edit' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full/3/1264551117430000'/>
            <gd:email rel='http://schemas.google.com/g/2005#other' address='[email protected]' primary='true'/>
        </entry>
        <entry>
            <id>http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/base/4</id>
            <updated>2007-08-01T18:02:04.410Z</updated>
            <category scheme='http://schemas.google.com/g/2005#kind' term='http://schemas.google.com/contact/2008#contact'/>
            <title type='text'></title>
            <link rel='http://schemas.google.com/contacts/2008/rel#edit-photo' type='image/*' href='http://www.google.com/mate/feeds/photos/media/xxxxxxxxxxxxxx%40gmail.com/4/1B2M2Y8AsgTpgAmY7PhCfg'/>
            <link rel='self' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full/4'/>
            <link rel='edit' type='application/atom+xml' href='http://www.google.com/mate/feeds/contacts/xxxxxxxxxxxxxx%40gmail.com/full/4/1185991324410001'/>
            <gd:email rel='http://schemas.google.com/g/2005#other' address='[email protected]' primary='true'/>
        </entry>
    </feed>

com código parecido (este é o script inteiro (atualmente))

$user = "[email protected]";
$password = "xxxxxxxxxxxx";

// ref: http://code.google.com/apis/accounts/docs/AuthForInstalledApps.html

// step 1: login
$login_url = "https://www.google.com/accounts/ClientLogin";
$fields = array(
    'Email' => $user,
    'Passwd' => $password,
    'service' => 'cp', // <== contact list service code
    'source' => 'test-google-contact-grabber',
    'accountType' => 'GOOGLE',
);

$curl = curl_init();
curl_setopt($curl, CURLOPT_URL,$login_url);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS,$fields);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); 
$result = curl_exec($curl);

$returns = array();

foreach (explode("\n",$result) as $line)
{
    $line = trim($line);
    if (!$line) continue;
    list($k,$v) = explode("=",$line,2);

    $returns[$k] = $v;
}

curl_close($curl);

// step 2: grab the contact list
$feed_url = "http://www.google.com/m8/feeds/contacts/$user/full?&max-results=5";

$header = array(
    'Authorization: GoogleLogin auth=' . $returns['Auth'],
);

$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $feed_url);
curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); 

$result = curl_exec($curl);
curl_close($curl);

$doc = new DOMDocument();
$doc->load($result);
$arrFeeds = array();
foreach ($doc->getElementsByTagName('entry') as $node) {
    $monkey = $node->getAttribute('{gd:email}');
    $itemRSS = array($monkey->nodeValue);
array_push($arrFeeds, $itemRSS);
}
array_unique($arrFeeds);

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