The major benefit of an Arduino Mega over smaller Arduino0-compatible boards is the extra volume of GPIO pins, and in conjunction with an Ethernet shield these can be controlled remotely via a web page thanks to the tutorial by the Starting Electronics website.
For more information including the code and other interesting notes, visit the tutorial's home page. And for more, we're on facebook, twitter and Google+, so follow us for news and product updates as well.
If you're interested in using an Arduino Mega with Ethernet, a microSD card and more - it's time to upgrade to the Freetronics EtherMega:
Quite simple the EtherMega is the fully-loaded Arduino-compatible board on the market today. Apart from being completely Arduino Mega2560-compatible, it includes full Ethernet interface, a microSD card socket, full USB interface, optional Power-over-Ethernet support and still has a circuit prototyping area with extra I2C interface pins. So if your project is breaking the limits, upgrade to the EtherMega today.