I think it would be really useful if we had a way of starting a thread/topic based on a photo in the image gallery (or playa artifacts). These threads could go into some sort of "image talk" subforum and at the top of each thread/topic, the image that is being discussed could be displayed. The image gallery could then be updated to contain "read discussions about this photo" or "start a discussion about this photo" links.
This would allow people to attach their thoughts, memories, feelings, or other info to a photo, it would give those who view the photos more context about that they are seeing, and it would provide a springboard for all sorts of interesting discussions. Together, this would encourage and allow the community to express and share experiences, rather than just photos or discussions.