Being TiVoless, I've tried a couple programs that claim to be able to automatically download the TV shows I want to see, but have always returned to doing it manually. Ted is another such program, but it has the distinction of being a cross-platform Java app. It also seems to have a clean and simple interface, but looks like it only supports one RSS feed for each show, which may cause problems if the shows you like are on the obscure side. When it finds a new episode of one of your shows, it'll automatically load it into the BitTorrent client of your choice and start the download.