EagleTec USB NanoSac microSD Card Reader

From Coolest Gadgets -

The EagleTec USB NanoSac is an extremely small, lightweight (2 grams) microSD card reader that supports both microSD and microSDHC memory cards. More importantly, it has hot-swapping capability, making data transfer very convenient, especially since at its size, you can leave it permanently plugged into your USB port without fear of it snapping off.