Commodore was indeed defunct by the time the Walker was developed in 1996. What was left of Commodore was bought by Escom LTD of Germany in 1995 for a paltry $14 million. Escom was the company that developed the Mind Walker, as it was known, protoype. It never got out the door because Escom went belly up the following year. Viscorp, which attempted to buy the Amiga assets at one point, wasn't interested in the Mind Walker and neither was Gateway when they purchased the Amiga assets for the patents.

Slight error on the entry about the Atari Joyboard. It was not, in fact, developed by Atari but by Amiga before they were bought up by Commodore.

The developers of the Amiga got some of their early funding by producing third party gaming hardware for the Atari 2600 and ColecoVision. The Amiga Joyboard was just one of them. They also had these really weird mini-joysticks. I still have one and it still works great. Never was able to break it.