Not sure if sarcasm but I don't care much for the FDA, they really complicate the research process and are slow to accept new drugs that can be rapidly discovered and developed using modern techniques.
Hopefully there will be more human trials for the anti-neoplastic roles of cannabinoids, the majority of clinical trials are for its use in satiety, anti-emetics and sleep. It is a real shame that if what Dr. Hill suggests is occurring
in vivo (unfortunately the biochemical pathway effects he is discussing have only been observed
in vitro or in non-human animal models) he should get a study together and get something published in a peer-reviewed journal. I searched for some articles of his regarding this but didn't find any except for the two mentioned on his website which have not been published in a reputable journal.
EDIT:
Since people seem interested in this, here is a really thorough paper describing the system possibly manipulated by this treatment. Warning lots of chemistry talk...
The Endocannabinoid System and Sex Steroid Hormone-Dependent Cancers