Start the threaded retrieval of items. Populates the 
        ``items`` list with :class:`Item <boto.sdb.item.Item>` objects.

def run(self):
        """
        Start the threaded retrieval of items. Populates the 
        ``items`` list with :class:`Item <boto.sdb.item.Item>` objects.
        """
        for item_name in self.item_names:
            item = self.conn.get_attributes(self.domain_name, item_name)
            self.items.append(item)