Yes, you heard that correctly, there is now a tattoo system that lets you change the graphic to suit your mood or even hide it completely like it was never there. The system uses E Ink technology which has been around for years and is used in many E-Book devices like the Kindle. E Ink is basically made up of very tiny ball’s that have a white side and a black side allowing you to put a charge on each little ball individually so that one of the sides faces up. It stays that way until another charge is applied. No need for electricity until you want to change the image.

Just imagine the next generation system based upon OLED technology giving you full color and video like animations. Yikes. I don't have any tattoo's, but something like this may be worth considering even if it only used for the company logo at trade show events : )

You can check out the product in action here - http://www.thinkgeek.com/stuff/41/moodinq-tattoo.shtml