Forgive me if this is not news, but I had not noticed it before:
http://www.yamaha.com/yamahavgn/CDA/ContentDetail/ModelSeriesDetail/0,,CNTID%25253D546518%252526CTID%25253D205500%252526CNTYP%25253DPRODUCT,00.html

As of now there is just one (fairly long though) video demo and no audio demos. As expected it will be the board just below the PSR-1500 (until that is replaced of course), and will cost "considerably less" than $1,000. For what it is it looks good.