Let me know if anyone has any questions, this was a fun project to tackle. The electric imp was interesting to work with, however the cost of the Imp + breakout board was more than a raspberry pi + wifi dongle. The Pi also does much more than just wifi, and I don't have to program it in squirrel.
Hey, great work! This is awesome! If you're looking to display weather and stock information too, you might want to check out my project here: https://github.com/zachfeldman/digi-lcd-server.
I've got a similar art project I'm working on for my company. I plan on setting up a light array where each light represents a user currently on our website and the color/activity represents an action or location.
It's all part of my desire to make our server room 'feel' more interactive than it is right now. Thanks to co-location I've got three big glass windows and only one physical rack on location :)