I bought an early EEG interface from MyndPlay. It still sits fairly unused in my wall-mounted cabinet. For shame.

I was pretty interested in this stuff a little while back. Daily work needs kind of steamrolled it.

I recently interviewed with another company working on these kinds of devices, however their application appears to be limited to wave tracking for meditation. They failed me for not being able to answer some vaguely-worded multithreading questions when the job was to work in web and embedded software...

I'm still intrigued. Like @winterismute said, I wonder if ML can help — maybe with pattern detection/seeing through the ..."junk".