Update
This just in from David Holland, event counsel, via comments.
"Chillax, all is good over there. I am one of the attorneys for High Times and this started over a misunderstanding about a permit application filed by the venue to host the event. Our US and Dutch lawyers have just finished reviewing them with the police there. No attendees have been arrested and attendees are not the targets of the police presence. Police are ensuring that all vendors are in compliance with the 500 gram limit under the Opium Law for licensed vendors at the venue. Only one vendor has been identified as potentially over the limit, but only slightly. In any event, the show will go on tomorrow and additionally, the Melweg will be opening at 2pm tomorrow to accomodate judges who do not wish to trek outside of Amsterdam so that they can avoid the lines and vote early. Further details will be posted on the High Times site later today."

Peace GS