[adventureloop]

This is pretty cool I currently use a lexar 32Gb usb dongle[1] though it does protude from the macbook air.

There are also usb drives that fit inside the usb port and does not need a special tool to remove, though I cant find it on amazon anymore.

[1]http://www.amazon.co.uk/Lexar-32GB-Echo-Backup-Drive/dp/B004...

[ja27]

There are some really cheap microSD USB adapters that fit almost completely inside the USB port. http://www.dealextreme.com/p/kawau-world-s-smallest-microsd-...