http://oldsjetfire.com/
http://alkymethinjection.com/
It was also used in Formula 1 racing for a short period of time before being banned for adding too much horsepower.
http://www.alcoholinjectionsystems.com/a11/116+-Octane-With-Water-Injection!/article_info.html

ROD

 

I've used seafoam a few times. I've never had a problem with it eating seals or killing an 02 sensor. Didn't make an "omg" difference but it helped a little.

 

^x2. I've used it in my S and my old Civics. Seemed like it helped to smooth out idle, but could have been the placebo effect. Hasn't hurt anything yet that I can tell. I do use a majority of the bottle in the gas tank though.