Heather, this is a fine idea & thanks for volunteering to put it together. Damion tried to sort one out last year, but his job working for The Man got in the way....and so we didn't get it finished in time.
I'll contact you offline about the details and once we've got them agreed we'll set up a separate post here to let everyone know what the process is for submitting images etc. I suggest we use at least 2 vendors in different parts of the world so that as many people as possible get to pay local shipping rather than overseas, but like I said...that's for the details.