You do know SIM card, don’t you? Well, someone has just turning the mini-card into a huge Notepad and Address book. They called it SIMbook and I guess it’s not related with the SIMs in any way.
There are two different version available with one looks black and the other looks cool blue. All have the gold-plated chipset but you can’t inside it to your phone. It’s only for cool looking you can get it for £3.49 or $6.