ive been asked for permission of my pictures before. depending on what its for i ask to keep my copyright on it, or for it to be mentioned. also depending on whats its for ill ask for money.

ex: if they are going to use it for a painting you bet i want some money, im sure they are not going to give that painting away. for the "free calander" ill ask that my copy right be on the photo or that its mentioned on the page somewhere.