E-Casio.co.jp has a new program (English translation) where you can order your own customized G-Shock. You can choose between a DW-5600 and a DW-6900. Basically, you can have whatever you want printed on the resin parts. There's a minimum order of five units. The price starts at about $160 USD each. This seems like a great idea, but the limitations and price make this offer a tough deal for most.

Team Anniversary G-Shock