Some good code in here - I like this concept - which is very like my way of using the Arduino:

Naguino: an Arduino-based LCD monitor for Nagios and Icinga
Nagios (or its recent fork Icinga) implement an Open Source network and application monitoring system. I use Nagios extensively, and I wanted to build an Arduino monitor for it — a little gadget that sits next to my screen, where I can glance at it quickly to see if everything is running.

As you'll see below, this project doesn't require a particular network or service monitoring system; you should be able to easily adapt the code to display whatever you want onto the LCD.

[From Jan-Piet Mens / Naguino: an Arduino-based LCD monitor for Nagios and Icinga]

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