It looks as if the Netherlands is not going to legalize marijuana any time soon.
You thought it was already legal here? Oh, you ignorant Americans. Sure, you cannot be prosecuted for buying or using it, but that doesn't mean it's legal. The European mind is capable of such subtleties.
(Seriously, here's the deal. Cannabis possession is against the law, but the public prosecutor long ago established a policy of not prosecuting people who buy or possess it for personal use. Under Dutch law, this written policy is enforceable by individuals; in other words, if someone were charged with possession in spite of the policy, the court would have to dismiss the case.)