mice.css

.mouse{
  position: absolute;
  background-image: url('../images/cursor.png');
  width: 15px;
  height: 22px;
  z-index: 100;
}

mice.js

io.setPath('/js/socket/');

function ratelimit(fn, ms) {
  var last = (new Date()).getTime();
  return (function() {
    var now = (new Date()).getTime();
    if (now - last > ms) {
      last = now;
      fn.apply(null, arguments);
    }
  });
}

function move(mouse){
  if(disabled == false){
    if($('#mouse_'+mouse['id']).length == 0) {
      $('body').append('<div class="mouse" id="mouse_'+mouse['id']+'"/>');
    }
    $('#mouse_'+mouse['id']).css({
      'left' : (($(window).width() - mouse['w']) / 2 + mouse['x']) + 'px',
      'top' : mouse['y'] + 'px'
    })  
  }
}

$(document).ready(function(){  
  $('#mouse_toggle a').toggle(function(){
    $('.mouse').hide();
    disabled = true;
    $(this).html('enable');
  }, function(){
    $('.mouse').show();
    disabled = false;
    $(this).html('disable');
  })
})

$(document).mousemove(
  ratelimit(function(e){
      socket.send(JSON.stringify({
        'action': 'move',
        'x': e.pageX,
        'y': e.pageY,
        'w': $(window).width(),
        'h': $(window).height()
      }));
  }, 40)
);


var disabled = false,
    socket = new io.Socket('jeffkreeftmeijer.com', {port: 8000});

if(socket.connect()){  
  socket.on('message', function(data){
    data = JSON.parse(data);
    if(data['action'] == 'close'){
      $('#mouse_'+data['id']).remove();
    } else if(data['action'] == 'move'){
      move(data);
    };
  });
};

server.js

var sys = require('sys'),
    http = require('http'),
                io = require('../'),
                server = http.createServer(),
                socket = io.listen(server),
    json = JSON.stringify,
    log = sys.puts;

server.listen(8000);

socket.on('connection', function(client){
        client.on('message', function(message){
          try {
      request = JSON.parse(message);
    } catch (SyntaxError) {
      log('Invalid JSON:');
      log(message);
      return false;
    }

    if(request.action != 'close' && request.action != 'move') {
      log('Ivalid request:' + "\n" + message);
      return false;
    }

    request.id = client.sessionId
                client.broadcast(json(request));
        });

        client.on('disconnect', function(){
          client.broadcast(json({'id': client.sessionId, 'action': 'close'}));
  });
});