$('#widgets-available, #sidebar-drop, #content-drop, #footer-drop').sortable({
    start: function(event, ui) {
        item = ui.item;
        newList = oldList = ui.item.parent().parent();
    },
    over: function(event, ui) {
        //Get Current droppable??
    }
}).disableSelection();

over: function(event, ui) {
        $(this).find('.numdrag').size(); // give the count of elements with class .numdrag in the drop area
    }

over: function(event) {
      var myDroppable = event.target; //this is element where it's being dropped
      var mySortable = event.toElement; //this is the "handle" element that fired the sort event in the first place.
}