1) Black & White: I honestly don't think I've got anything for this category short of desaturating something, which may be outside of the submissions mandate.
2) Landscape/Nature
3) People/Portrait
4) Travel/Architecture
5) Macro/Abstract: Mixed feeling here. I've got this, but otherwise not a whole lot to play with.
6) From the Attic: Again, not sure if I've anything that fits. Most of the family's old photos are kept by my grandmother, and they've some terribly interesting images.