In my current professional incarnation, I work with naming services. All day, every day. It's What I Do.

The idea is a simple one: Throw together a PIC, some blinkenlights, and an Ethernet interface. Run some code elsewhere that gathers some interesting data about DNS queries, and displays it.

Perhaps just something that flips an LED on/off whenever a DNS query happens.

Suitable for sitting in/above a cube at work.