An upgradeable usb key – a very small micro sd card reader review
USB 3 is great, micro sd cards are great too. Combine a very small micro sd card reader and USB 3 and you got yourself a very nice upgradeable USB key. And a micro sd card reader obviously.
Bought mine at dealextreme
http://www.dx.com/p/cy-u3-286-mini-size-5gbps-super-speed-usb-3-0-to-micro-sd-sdxc-tf-card-reader-adapter-412746#.WVuC8NOGPHc