Apple Filed new "podmaps" patent
This concept is said to merge visual maps and spoken directions which lets users request directions from there location and is presented with visual maps and spoken driving directions. According to Apple the text, maps, and audio are sent to a "podmap creator" which turns the directions into a video podcast that is stored on an RSS server to be retrieved by the user at any time.
"In this regard, the application server can reply to the client program to notify the client that the requested podmap is now available from the podmap RSS server. The client program can then interact with the podmap RSS server to retrieve the requested podmap," (Apple)