One more post. This is taken from a Cannabis faq which can be found at http://www.erowid.org/plants/cannab...ption.shtml#eat

A direct quote:
"It is a myth that dried marijuana must be heated before being consumed to activate the cannabanoids. Many people find that raw cannabis leaves and buds can be eaten for strong effects without any pre-heating. It is a common belief that heating the cannabis before ingestion increases its potency and cooking extractions using food oils (such as butter or olive oil) are the most common methods for making cannabis-based foods.[Section Edited by Erowid Feb 19, 2002]"