I made a 4 Wheeled, remote-controlled Rover using Phidget's DC Motor Controllers and the Phidget Network Server. The code for the project is on github:
https://github.com/dhodges47/Phidget-Rover-Controller
I used the Nomad chassis from ServoCity as a base.
This project demonstrates how to use javascript (as in NodeJS) to remote control a Rover over wi-fi via a web page or a game controller.
In this repository, the bulk of the interesting code is in app.js and PhidgetServer.js. All the webpage code handling the user input is in www/index.html.