In Windows I used an RSS feed to download a tv series, but Deluge doesnt have that option. Is there a plugin to add that fuction? How do I install and configure it?
If there isn't a plugin which client do you recomend?
A little late to the discussion, but...
Deluge has an RSS plugin called YaRSS2. Vuze can handle RSS, too, but it's written in java and so it doesn't integrate well with GNOME. The slightly beefier Miro can, as well, but it either has a bug or plays nanny about what torrents you can download. If you want to use Transmission, there's an insanely complicated-looking setup described here on Ubuntu Forums
I prefer rtorrent + rtgui, a web GUI for rtorrent. If you do this, make sure to manually install the latest libtorrent and rtorrent (which needs to configured --with-xmlrpc-c). These directions are basically what you need to do, but make sure you use the latest and greatest versions of everything.