[Google Maps API v3] Retrieving FeatureData from KML in Google Maps

[NWIPHPDEV]

Hi,

I've been trying to get this work for days now.  According to the
docs, V3 of the Maps API allows you to get the featureData from a KML
Feature on a Kml "click" event after the KML is overlaid.

I'm getting "some" data in the returned JSON object, but not
everything thats contained in my KML (or at least what i need)

here is a sample of my kml

<Placemark>
<Style>
      <IconStyle>
        <Icon>
          <href>http://google-maps-icons.googlecode.com/files/
restaurant.png</href>
        </Icon>
      </IconStyle>
    </Style>
<name>The Whole Donut</name>
<description>FREE Donut w/purchase of Large Coffee&lt;br&gt;&lt;br&gt;
920 Enfield Street&lt;br&gt;Enfield, CT 06082</description>
<Point>
  <coordinates>-72.5547543012822,41.9839647819395,0</coordinates>
</Point>
<ExtendedData>
  <Data name="offerid">
    <displayName>Offer Id</displayName>
    <value>359</value></Data>
  </ExtendedData>
</Placemark>

the full KML can be viewed here : 
http://dev.nwi.cc/nfpconsumerview/xml/georss.kml

Here is an output of the object I'm getting back from the KML event:

 Object
        status: OK
        id: g290f277fb7197bf1
        name: Italian Gourmet Deli and Bakery
        description: 10% OFF a full catering job<br><br>15 Hartford
Avenue<br>Newington, CT 06111
        snippet: 10% OFF a full catering job15 Hartford AvenueNewington, CT
06111

As you can see from the object above, none of the "ExtendeData"
elements are passing.  Am I doing something wrong, is my KML
malformed?  I just cant seem to figure it out...

Thanks in advance for your help

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