It looks like Amazon wasn't done leaking their new tablet hardware when they gave us specs and an image this morning, because new images have come to light.
AFTVnews has discovered four thumbnail images on Amazon's servers which are likely the new family of Fire tablets (1, 2, 3, 4). The thumbnails are too small to show any real detail, and the images don't have any useful detail, but the existence of the image and their file names provide useful clues.
If you click through the links in the above paragraph, you'll see tiny images with unique file names.
The specs came with unique model numbers, all starting with KFF (6.7" screen), KFM (8" screen), or KFT (10" screen). The four images have unique file names (fs-a, fs-f, fs-m, and fs-t), with fs-a being the smallest and the only tablet to show a 4:3 screen geometry.
This suggests that three of the images (fs-f, fs-m, and fs-t) belong to the three leaked specs, and that "fs-a" does not.
That leads to the conclusion that Amazon has an even smaller tablet in the works, one with a model number KFA_WI. This could be the $50 budget 6" tablet we've heard about, but it might also be even smaller.
It's not out of the question for Amazon to release an even smaller PDA-sized device as an iPod Touch competitor, possibly with a 5" or 4.3" screen. But we won't know for sure until the next leak, or until Amazon formally launches the devices.
That might even happen tomorrow. AFTVnews is also reporting today that Amazon is launching the Fire TV tomorrow, and I think they're right. We might also see the tablets (it is unlikely, though).