On a sidenote, I hope Apple provides some photo sorting and more robust options in future updates as this seems to be a rather silly oversight. Except, when I uploaded the photos in iTunes, they'd get all out of order, and as it stands, there is NO way I know of to sort them in iTunes or on the iPad directly - they are sorted by date taken, period, unless you have iPhoto, which I don't since I don't have a Mac (and there's no version for PC).
So I was very frustrated as I read manga, etc., sometimes in image file form, and the Photos feature on the iPad is perfect for it.