tDCS: a tiny amount of current into one's brain produces amazing performance gains!

I just heard the most recent Radiolab Short episode, which concerns tDCS with a couple of people describing their experiences with it and researchers discussing its prospects.

I won't spoil the Radiolab episode by discussing its contents in detail, but you won't be disappointed.

In addition to researchers, there are also a lot of amateurs working with tDCS, since hardware setups can be built for as little as $20. For example, this guy used a Radio Shack circuit teaching kit.

The potential for this "9-volt nirvana" seems enormous in so many areas of human endeavor it's hard to count ...

Any of my 6 or 7 regular readers tried this yet?