TVShows for Apple TV
The killer plugin to end them all would be this: - subscribe/unsubscribe to tvRSS.net TV Shows on the Apple TV, like you can in the (very much in need of an update but otherwise excellent) Mac OS X TVShows. - use (and probably install, with the correct LaunchAgent item) rtorrent - make downloaded torrents available to rtorrent
If only there was a subtitle downloader connected as well it would be TV heaven, but I guess most users don't really need or want subtitles. If you do, www.tvtvsubtitles.net is a very good and fast site for getting them.