OK, I'm going to date myself by admitting that I remember when I thought the credit card thin calculators that were included in Day Planners in the 80s where rather nifty. Oh, how times change. The Samsung P300 mobile phone is a mere 9 mm thick, the same width of a standard credit card. Somehow, they managed to squeeze in a 1.3 megapixel camera, Bluetooth and a MP3 player into this tri-band phone. Best of all, it sort of looks like a calculator.

You can get it now from Dynamism for $449, unlocked and ready to use if you have a sim card for a GSM service provider like Cingular or T-Mobile.