USB gadgets are all the rage at the moment, and you wont find a better brand than Satzuma.

Gentle LED Glow illuminates your keyboard or desktop
Sleek, high-tech design
Small and lightweight
Bendable neck
Low Power Consumption
No software required
USB Powered
No batteries required

Minimum System Requirements:
PC and Macintosh platforms
32MB of system RAM
50MB available hard disk space
One available USB 1.1 port