ARS Technica had an interview with Richard Marks, the man behind Sony's PlayStation Move controller. Marks wants to open up Move to researchers and hobbyists and give them access to all the data the Move creates, but he also added that it doesn't make sense to release Move for the PC because it's not the right kind of form factor for PC gamers:
Even though he's clearly enthusiastic about the idea of researchers and hobbyists using the Move, it will remain a gaming product, and will be marketed as such.
"I think the Move is a good PlayStation 3 product. It makes sense for that console; it doesn't make sense as a product for PC," he told me. He pointed out that hobbyists and researchers would have a great time with a version of the Move that worked with their PCs, but that the hardware has limitations as an interface for computers.
"It's just not the right kind of form factor to sit in front of the PC with this sized device," he said. Something smaller may work better.