Or alternatively, you could subscribe to various AV podcasts with their alternative format "RSS feeds" on a PC using a UPnP Server such as TVersity and then stream the desired podcast at will to the Nokia 770 in a preferred format using Media Streamer or Opera browser and mplayer. (This option allows the feeds to be subscribed to and listened/watched by other UPnP devices etc around the home as well)

(When Video is directly supported via Media Streamer on the Nokia 770 it will be easier and more intuitive with a Media server such as TVersity)

TVersity
TVersity Forum