Dynamic Hyperlinks in DataGrid/AdvancedDataGrid

Question

Forgive me, but when the web was build around hyperlinked text, it should be easier to create hyperlinks in a Rich INTERNET Application.
Ok - enough griping. I do have a legit question:
For historical reasons, I have to construct hyperlinks from a number of parameters passed in the URL (aka GET params). Since I write reporting systems, those hyperlinks usually have to appear in a table of some sort: a DataGrid or AdvancedDataGrid.
My typical code looks something like this:
<mx:Application blah=blah>
     <mx:Script>
          <![CDATA[
          ]]>
     </mx:Script>
     <mx:HTTPService id="getStuff" method="get" url="http://www.example.com/getData.php" result="processServerData(event)"/>
     <mx:AdvancedDataGrid blah=blah>
          <mx:columns>
               <mx:AdvancedDataGridColumn blah=blah itemRenderer="ADGcustomItemRenderer"/>
          </mx:columns>
     </mx:AdvancedDataGrid>
</mx:Application>

Answer 1

OK, I didn't mean to post that yet. Why can't I edit my post?
Anyways...
<mx:Application blah=blah>
     <mx:Script>
          <![CDATA[
               import a.bunch.of.stuff
               protected function onInitialize():void {
                    getStuff.send();
          ]]>
     </mx:Script>
     <mx:HTTPService id="getStuff" method="get" url="http://www.example.com/getData.php" result="processServerData(event)"/>
     <mx:AdvancedDataGrid blah=blah>
          <mx:columns>
               <mx:AdvancedDataGridColumn blah=blah dataField="dataFieldName" itemRenderer="ADGcustomItemRenderer"/>
          </mx:columns>
     </mx:AdvancedDataGrid>
</mx:Application>
ADGcustomItemRenderer.mxml
<mx:Canvas blah=blah>
     <mx:Script>
          <![CDATA[
               import mx.controls.dataGridClasses.DataGridColumn;
            [Bindable] protected var myURL :String;
            override public function set data(value:Object):void {
                    myURL = '<a href="http://www.example.com/dosomething.php?dept_num=00000&vendor='+value['dataFieldName']+'" target="_blank">'+value['VendorName']+'</a>';
          ]]>
     </mx:Script>
     <mx:Text htmlText="{myURLl}" height="100%" width="100%" />
</mx:Canvas>
Notice the dept_num? I need to pass that data to the itemRender, since it can change from page to page (though not row by row) in addition to the column-specific data passed via the "value" object. How can I access that data from the custom itemRenderer?
Thanks