Of course, we're more intrigued by the device's ability to put other content on the DS. Piracy? Who said anything about piracy? The DSVision could do a lot to mainstream the DS's homebrew development community, especially with its official endorsement from Nintendo.
DSVision is due for release in Japan this January, at a suggested retail price of ¥3,980 (or approximately $37 USD). The online digital content store isn't due to open until March. We smell a hot import item...
Update: Added that this is a Nintendo-licensed peripheral. Thanks, Crono & Hakobus