After transitioning my YMU account over to Rhapsody, I ran across a message in the Rhapsody Knowledge Base which details how funtionality will change after the firmware upgrade and Yahoo’s official discontinuation of its music service. I will miss the streaming and download integration, but, the Launchcast and Flickr support will be retained. The link below gives details and timeline:
http://help.yahoo.com/l/us/yahoo/music/jukebox/portdevices/sansa_connect.html