For a daily podcast load, I use Juice with Windows Media Player.
Once you set up WiMP for synchronization, you can sync with the internal memory or the µSD card by clicking “next device” while sync mode is active. The µSD card will show up in the upper right corner of the WiMP GUI.
You can have Juice run in the background if you wish, and have it download at regular intervals.
Now here’s the cool part. You can also configure Juice to clean up podcasts older than a set interval for each 'cast, meaning that your device will always have the latest podcasts, and the old ones are cleaned up.
Bob 
