The iPad's Camera Connection Kit is a remarkablytalented accessory. With its standard USB connector plus a bit of ingenuity, clever folks have found all sorts of things to connect that would not ordinarily be expected to connect: headsets, keyboards and a variety of storage devices. You can even connect an iPhone to an iPad and import photos from one to the other.
Given a powered USB hub to provide adequate juice, it's possible to fake out the iPad's import process by using a MS-DOS/FAT formatted floppy and putting a "DCIM" folder on the disk. Any photos inside that folder that have DOS-legal filenames (8.3) will be read by the CCK and the iPad.
Is it practical? Heck no. But it's still pretty cool. Video below.