I believe the meetup will convene on the steps of the Graduate Library in the middle of the Diag. Walk about 100 yards due east of the map marker and you'll be there.
Parking in A2: http://www.a2dda.org/parking__transportation/parking_opti...
Facebook Event: http://www.facebook.com/event.php?eid=174186589329750
Occupy Ann Arbor Facebook Group: http://www.facebook.com/groups/199678676768288/
Cause page on Facebook: https://www.facebook.com/occupyannarbor