Maybe I'm dumb, but aside from the fact I'm not 80 yet I can't figure out the raid calendar.  Everytime I've looked at it it shows no raids at all.  I put the little check mark by all the items when you right click on the minimap icon, but all that shows is Blizzard stuff.  ??  Am I missing something, or does it just not show up for me 'cuz I'm not 80 or something?