This looks useful even to just monitor and (hopefully) improve normal sleep patterns. I've been using an Up band for sleep tracking, and it has some accuracy i

This looks useful even to just monitor and (hopefully) improve normal sleep patterns. I've been using an Up band for sleep tracking, and it has some accuracy issues, but is still useful; a device monitoring brainwave patterns could be more accurate. Might be fun to hack around with for other brainwave monitoring purposes, such as meditation/biofeedback.