I was going through my Bookmarked websites trying to weed out the ones I never visit, and I came across this site I found a long time ago. I originally bookmarked it because he had a instructional on head gasket replacement and I was trying to gather as much info on it. I started clicking stuff and found a page where this guy set up a list for people to report their Bad headgasket cases. Apparently Toyota reviews these and chooses to research certain cases.
http://www.geocities.com/MotorCity/Speedway/1636/register.html
http://www.geocities.com/MotorCity/Speedway/1636/register.html