Automatic allows you to setup subscriptions for your favorite content provided through RSS feeds. After setup, it works in the background to download the latest files with absolutely no user interaction required!
Use it with podcasts, videocast, torrentcasts, etc. Filters can be defined to avoid unwanted downloads and the history records every item downloaded.
LEE123 I currently have automator doing this very same thing and it is already on your mac. I will try this though as automator has a few quirks that this software may solve and it looks a little easier to set up. (Version 0.9.5)
ALGOS I've been using earlier versions of Automatic (initially offered at the Transmission forums) for a couple of months and have been very happy with it. Recommended! (Version 0.9.5)