When I was at the Prostate Cancer Research Institute convention last fall, several of the leading prostate cancer docs were pleased with the results of pomegranate. They didn't feel it necessarily as a cure, but more as a health booster to help your own body fight off cancer. They classed it right in with options to try just like hormone therapy and other cancer drugs. Obviously the cancer drugs do not work on everyone and pomegranate juice probably will not work on everyone either.
They mentioned some tests had good results with the POM pills and they are quite a bit less expensive than the juice. And easier to use when on trips, etc.
Probably something that has to be decided by each individual.