This is actually a couple years old, but I stumbled across it today.
A team at Rensselaer and the Washington University of Medicine in St. Louis are developing a small, implantable thermoelectric device and heat pipe to cool specific portions of the brain and help inhibit epileptic seizures. The full story,
http://news.rpi.edu/campusnews/update.do
indicates in 2005 they were moving toward testing in primates.
A journal review article on the subject is available: