I have finally been able to get rTorrent and bashpodder playing together on the DNS-323 NAS. In short bashpodder acts as the RSS feed reader and downloads the torrent file to a directory that rTorrent watches and then rTorrent kicks off the torrent download. Its light and NOT a resource hog (which is important for the DNS-323 as its got little resources to start with).
Please see my write up at the DNS-323 hack forum.