We're writing a feature to check in on scientists working on bridging the gap between brain and machine. We're planning on asking them, "What's taking so long?"

When I think of brain-machine interfaces, a couple of things come to mind: The Borg from Star Trek, whose neural implants give it the ability to communicate telepathically as well as control implanted tazers and pincers. Then there's The Matrix, where a plug in the back of the brain connects the user to an elaborate virtual world.

While scientists work out the kinks of making the brain connection, we want to hear your thoughts on what kinds of problems this technology should tackle first. Some readers suggested "body piercings that have a legitimate use," such as, say gaming or text messaging. Others want to see the technology help amputees and paralyzed individuals regain motor control.

What's on your wish-list?