So far, I have been concentrating on rpg elements, as this seems to be what people would like. It already has: several old (roman and anglosaxon) coins, gems, celtic tiles, coats of arms, compasses, 197 world flags, wooden and stone gadgets (dials, knobs, sliders etc.), oak panels, astrological buttons, ... and I will be adding medieval weapon icons too, like swords, battle axes, and icons like potions and magic things ....
I'm going to be working more on this in the coming week, so if there are any things in particular people would like, now's the time to say, and I'll see what I can do.
By the way, the latest release now has the ability to change the image of panels from within DBPro.