They aren't very expensive. Just leave the card reader connected to your computer and insert the memory card in the reader.

I use a Viking IntelliFlash USB 6 in 1 Flash Memory Reader.

To remove the card, I go to the appropriate ''Removable Disk'' in My Computer, right click on it, and then click Eject. The indicator light next to the card will go out then you can remove the card.

You won't have to connect the camera to the computer to download photo files thus saving batteries. It is easier and possibly faster than connecting the camera to the computer.