The Apple Lightning to SD Card Camera Reader for iPad is available now for $29 and is a necessary accessory for nimble iPad-toting photographers (iPad 4 and mini). And unlike past situations, you can get the reader now so you're ready to go once you receive your new iPad.
But you do have to purchase both the SD card reader or the USB version separately. In the past, the older versions came together for the same price. No more. I went with the SD card reader for now.
In case you're wondering, the reader does not work with the new iPhone 5. You'll get an "incompatible accessory" message.