Wu's Clues

At the top of Wu's Clues, you'll find the following weird (but beautifully artistic) image. What is it?
My Chinese Seal (Wu Qi Guang)

Actually, it is a Chinese Seal (or "chop"). My name (in Chinese) is Wu Qi Qi Guang Guang (pronounced, approximately, woo chee gwang).

According to Zhongwen.com, my surname, Wu Wu: click for audio, is the 8th most common surname after Wang Wang, Chen Chen, Li Li, Zhang Zhang, Liu Liu, Yang (my mother's maiden name) Yang: Click to pronounce, and Huang Huang, and just before Lin Linand Zhou Zhou. The top 200 surnames account for 96% of all Chinese people. You can click on each character to hear how it sounds in Chinese!