There was a thread on one of the other forums talking about removing the plastic film from the backside of the LCD (part that shows when you open the keyboard). Part of their reasoning was it looked nicer to others when you have the keyboard open typing whatever and showing off the glossy "backside".
I decided to take the idea of "showing off" the shiney backside a step farther and even rubbing it in a little (see pic)....
Great idea for someone(not me) to make some money on Ebay, it's just a matter of time before someone else does it. Another good decal for that area would be "iPhones Don't" in the same font/style :-)
Disclaimer: Just a fun silly idea on a rainy Wed morning, I am sure putting a decal there might cause some problems if the edge starts catching and peeling back.