Ok, some preliminary information then ...
* 61 notes with semi-weighted keybed.
* New voices (esp. Guitars, Organs and breathe-taking Sax). Wait until you hear these...
* New styles with more focus no the main-stream market (Jazz, RnB, Ballroom, Ballads, Caribbean).
* New features (RIFF/Auto Chord scan, 16 Assignable buttons, instant access to REGISTRATIONS right infront of you, intelligent fill...
* Silver finish with rebuilt sound system and better bass reproduction...
I am currently setting up and have to go. I guess others who attend the show will be bringing forth more information from here.
Also the EXP package (for the SD1, SD1Plus, XD9, XD3, X1 and X4) will be available at the NAMM. It will be marketed as an OPTION available to all. I will however have one unit at the show to clearly demonstrate what the package will/can do for your keyboard.
AJ