If I set a beginning date/time for a resource item to some date/time in the future and I choose to send an email notification, site participants receive the email notification immediately and upon selecting the link in the notification for the item, have access to the resource regardless of the begin date/time that i set. I would expect that the notification would not be sent out until the beginning date/time arrives. Please let me know if you need any additional information. Thanks!
Also no notification for hidden items.