For some time you have been able to download your Podcast's directly to your iPhone. However lets say your on the Skytrain or Bus and you want to listen to that freshly released Podcast, the problem is to download anything over 10MB requires that you be connected to WiFi.

So that's not going to work out so well for you. But instead of tapping the "download" button on a Podcast, simply tap the episode's title.

Your iPhone will begin streaming it automatically, ignoring that 10MB limit. Even if you want to play Bejeweled while your listening to your episode, you can continue to listen even if you exit the iTunes app. Very nice!