access keys for navigation

It would be nice to have access keys to open all drop down menus.

A snippet for up an down keys in jQuery:

  $(document).keydown(function(e) {
    var key = e.charCode ? e.charCode : e.keyCode ? e.keyCode : 0;
    switch (key) {
      case 37 :
        // alert('goLeft');
        break;
      case 38 :
        // alert('goUp');
        break;
      case 39 :
        // alert('goRight');
        break;
      case 40 :
        // alert('goDown');
        break;
      // case 13 :
      // alert('Activate');
      // break;
    }
  });

Just an idea. To me this would still accelerate the use of AM a bit.