808 State,
Bob Andrews,
Julian Colbeck,
Adrian Cook of Electrotunes,
Michael Cotten of The Tubes Group,
Chick Corea - the second one one made,
Wolfgang Dauner,
Rick Davies of Supertramp,
Dennis DeYoung of Styx - used extensively on Grand Illusion album (1977),
EDP (the company, Adrian Wagner and Chriss Huggett, during the development of the Wasp),
Electronic Dream Planet,
Larry Fast,
Flood of Node,
Michael Fonfara of Lou Reed Band,
Frontline Assembly,
Jan Hammer - played with his Probe remote keyboard,
Herbie Hancock - the third one made,
Jesse Harms of Ry Cooper Band,
Micheal Hoenig,
Mark Isham,
Human League,
Chas Jankel,
Masterworks,
Hideki Matsutahe,
Lyle Mays of Pat Metheny band,
Michael McDonald of the Doobie Brothers - "What a Fool Believes",
Patrick Moraz,
Klaus Netzle,
Pink Floyd,
Steve Porcaro,
The Shamen,
Eberhard Shoener,
Tim Simenon,
Tangerine Dream,
Stevie Wonder - the first one made,
Gary Wright,
Joe Zawinul
[Let us know if you have any further additions to this list.]