create

I`m trying to make a calendar block with clickable dates. this is for a guest house to make reservations.Clicking on date would take to /node/add/my_event/2009-06-05 or /node/add/my_event/?date=05-05-2009 or similar. I want to pass the date as argument to "create content" form. any guest has access to create this type of node, but the default state is "unpublished" so that only administrator can approve (publish) the node. after that the created event would appear in calendar block and have CSS "has-event" definition (e.g. red color).