Spotted in Popular Science (February 2006 issue, page 85). Also spotted in Wired (Janary 2006 issue, page 36 in the form "promatorium").
A technique, developed by Susanne Wiigh-Mäsak, whereby a body is freeze-dried in liquid nitrogen, and then jolted by a vibration at a specific frequency, reducing the body to a powder of flour-like consistency. The remains are placed in a box made of potato starch and shalowly buried so that the whole thing disintegrates in about a year.
See the Promessa Foundation web site for more information.