Read the Original Article at http://www.informationweek.com/news/showArticle.jhtml?articleID=230800165
BYTE -- Open iTunes to the list of Podcasts and use the keyboard combination [Ctrl] [A] to highlight the entire list.
Then right-click and select Update Podcast from the context menu. It will check for updates and download all your podcasts at once. So much better than getting them piecemeal.