I have noticed that the Yamaha site has no mp3's posted yet (only the video from NAMM), and I managed to find this one (sorry if it's been posted before):

http://keyboard.eskildsen.dk/Upload/Files/Yamaha/PSRS500-02.mp3

Nice use of the usual Yamaha 'theme' that always pops up on the PSR and Tyros demos. I think Martin Harris must be responsible for creating these demos on the Yamaha home keyboards, as he often uses the same themes in his live performances.

Anyhoo, I'm really impressed with the demo and think it sounds quite close to the PSR 3000. Such a shame Yamaha didn't make this arranger 64 note poly and also provide the fingered on bass facility as I would have definately purchased one as a cheap 2nd keyboard.

Regards
James