Here's an interesting summary of some recent findings on neurofeedback used to treat depression. Axio currently only uses EEG to measure mental states, but something we're interested in here is creating consumer fMRI to help people understand more regions of their brains.

http://alfin2100.blogspot.com/2012/06/learn-to-control-your-own-brain-emotion.html

Talk about a good reason to watch what you eat! This article talks about how high-fructose corn syrup is destructive to synapses in the brain and therefore causes decline in memory and learning capability… in as little as six weeks! Instead, the article recommends eating more foods that are rich in Omega-3.

http://health.msn.com/healthy-living/the-common-food-ingredient-thats-making-you-stupid

This article talks about how musicians used neurofeedback to enhance their performance, by as much as 50%. 

http://news.bbc.co.uk/2/hi/health/3091595.stm

Interesting lecture on biofeedback and neurofeedback. The lecture is given by a professor at McGill University to an electrical engineering class. While the lecture is long (about an hour), I recommend watching at least the first minute because it gives a great basic definition of biofeedback.

http://www.youtube.com/watch?v=a53LA7aL2Og&feature=related

A lot of great information about how EEG works.

http://research.baycrest.org/eeg