I know I can use this to save ByteArray data to disk:

Actionscript Code:
var ba:ByteArray = new ByteArray;
    ba.writeUTFBytes('<?xml version="1.0" encoding="iso-8859-1"?>\n'+text)
    var fr:FileReference = new FileReference(ba);
    fr.browse(new Array(new FileFilter("XML (*.xml)", "*.xml;")));
    fr.save( ba, 'ticker.xml' );

...But is it possible to use the upload() method to write the same ByteArray to a server?

Actionscript Code:
var request:URLRequest = new URLRequest("http://www.[domain].com/uploader_script.php")

Thanks all.