http://www.stumbleupon.com/su/2apnVP/:ibyOvf+!:bl8v+hC@/list25.com/25-famous-logos-with-hidden-images/
This sight has 25 examples of logos that all have hidden images in the their name. my favorite is the FedEx, every time that that i see the logo i automatically look at the arrow. In addition i like the Baskin Robins showing the 31 flavors that make up their slogan for selling a product. all in all the use of having a hidden image makes the viewing audience look closely at your logo as well as automatically recognizing the design and what your company is about.
m3flynn 