I see it as being like the Polaroid exchange--you're giving away a one-of-a-kind work, and it is what it is. For the Polaroid Exchange I shot a series of 9 8x10" Polaroids, kept one for myself, and put one in the APUG Traveling Portfolio. This is even easier, because the film is cheap. I figure I'll just do one of my normal birding days, where I usually shoot around six rolls of film--maybe for this I'll shoot a bit more, but not by much--and for any good shot, I usually have a number of similar shots, and those are what I'll send out.