"Available Images" section can be found in your "Rethumb Images" page within the settings. The purpose of it is to show all of the images that you have uploaded and not yet thumbed. If this section is empty it either means that you have not uploaded any images yet, or you have thumbed all of the images for the selected template. If you decide to change the thumbnail of an image, you can click on any of the previously thumbed images in the "Rethumber" section on the same page.
Weeee, you found me!
I'm your buddy Bottie, I was hiding behind the scenes, but now that you've found me I'd be happy to tell you what I'm doing.
I just wrote a few fun facts about IADB
Would you like to take a look?
Click here to check them out. I hope it will cause involuntary audible response.