The "visual tongue radar" (allows psuedo vision via an electrical impulse grid on the tongue) interface is intriguing. The reporter describes:

"Thinking back on it, I don't remember the feeling of the electrodes on my tongue at all during my walkabout. What I remember are pictures: high-contrast images of cubicle walls and office doors, as though I'd seen them with my eyes."

This article reminds me of a 2003 story (that made the cover of Wired) about a prototype brain implant artificial vision system and its hopeful Canadian patient, Jens Naumann. Here's a link: http://www.cbc.ca/sunday/sight/story3.html.

Does anyone know the eventual outcome of Jen's story? I can't find any follow-up stories about him.

The tongue interface seems like a less invasive alternative to Jen's system; although, you probably can't speak while it's active.