Sending additional http headers using http.get()

Well, you should be able to specify them as an option to get, but if you're going that far it might be better to be more explicit:

   var options = {
      host: 'server.name.com',
      port: '80',
      path:'/my/path.php',
      method:'GET',
      headers: { "A":"B" }
    };
    var req = require("http").request(options, function(res)  { ... });

The Xively example does this, but with POST.