Website iPodnova has put together a list of BitTorrent sites tracking video torrents optimized for the Pod.
If your iPod is lonely for a few TV shows on the cheap (read: free), give a couple of these torrent sites a try. Granted, the day may come that this kind of file sharing is deemed... un-legal (illegal just sounds so dirty), but in the meantime, you might want to watch a little TV on that iPod.