Man gamers like the LCD equipped gaming KBs from Logitech and others. You can for example display CPU / GPU temps, voltages and such there. Specific gaming apps provide in-game information, as well as programmability and control. List of 60 or so games here:
http://www.logitech.com/en-us/products/keyboards/articles/554
Also ....
AMD LCD Keyboard Applet - displays processor name, L1 & L2 cache sizes, current voltage, core frequency, memory frequency, and HyperTransport™ technology frequency.
Fraps by Beepa - can be used with all games using DirectX or Open GL technology. Fraps performs many tasks such as: Benchmarking, Screen Capture, and Realtime Video Capture. Requires v2.7 or higher for G15 support.
Ventrilo by Flagship Industries
Xfire - Xfire is a free tool that automatically keeps track of when and where gamers are playing games online and lets their friends join them easily. Xfire eliminates the hassles of running multiple programs like IRC, instant messengers, or in-game friends lists. Version 1.62 and higher includes support for the G15 GamePanel.