Steve.
I posted a reply to a similar question from Don M. last week.
Yamaha says that the state of the update is now uncertain. The ability to play song chains is not a software update but would need to be a hardware upgrade and Yamaha has not made a decesion to go ahead with this. The keyboard will soon be replaced with a new model (next year) and doing a major hardware change might not be implemented by Yamaha. A software upgrade with a new data base and styles still might happen as well as the hardware upgrade still might happen. Yamaha is just not sure yet which route to take. This information was supplied to me by Yamaha USA.
George Kaye
Kaye's Music Scene