Castmaster

Never again miss a podcast because you forgot to sync your iPod.
Castmaster puts your podcasts right in the menu bar, allowing you to quickly play new episodes, schedule frequent downloads and automatically sync your iPods afterwards.

You can view descriptions and artwork for every show, and see which episodes are on which of your devices. Plus, you can prevent iTunes from disabling podcasts that you haven't listened to recently. Fully integrated with iTunes, Castmaster is great for keeping track of your favorite shows.