Another recommendation for some splendid free software: BGInfo. I was introduced to this at my last job, where many PCs would be setup and shipped to clients. BGInfo displays key system information as desktop wallpaper. Information might include IP address, domain, PC name, processor, RAM, disk space etc. I've configured two machines at work to show the Glassmatix hub ID too.
It's particularly useful when using a KVM, or virtual machines. Again, it's free and easy.