I was lucky that one of my android tablets supported an usb card reader.
There are few to less going forward tablets that will have full size SD card slots. BUT THERE IS ONE THAT IS VERY NICE and worthy of mention.
--> The Apple iPad 2 and the camera connector kit (29bucks).
My husband has a game camera that he wants to quickly check his pictures. I am looking for a tablet that he can stick his SD card from his camera in and see the pictures from the field. There are game camera readers out there for purchase but that is all they do. I would prefer to spend the money on a multi use tablet. Any suggestions for a good priced one?