Our site has a large group of shutterbugs even though it's not directed at photography.
I do the same thing every month by:
1) letting people attach a photo to a thread.
2) Manually uploading all submissions into a category in the Gallery
3) Creating a poll that uses the thumbnail from the gallery and the persons name
4) link to the image as oppose to the gallery page
Such as seen here.This is quite cumbersome, witch is why I made the suggestion.

I hope it gets considered in the future,