Methods, systems, and products share content between a device and a media delivery device. The media delivery device includes a content sharing application stored in memory and a processor communicating with the memory. The processor sends a presence update message to indicate the media delivery device...http://www.google.com.hk/patents/US20060271687?utm_source=gb-gplus-share專利 US20060271687 - Methods, systems, and products for sharing content
