www.420calendar.com is a good one I hear...
also for the person providing the links from mexico.... I like your sites, and I as well would like to do some stuff with you from the calendar site.... but FYI we here in america call what you call premium stuff in mexico dirtweed... and it only goes for 60 bucks an ounce around here... as compared to the over 300 bucks an ounce for the crappy ole american bud...