It would be nice if you could add a function similar to panoramio to the site, which detected long / lat information in photos and then plots it on a map so people can see where the photo was taken....
i.e.
http://www.panoramio.com/photo/7305957
Further integration to provide a panoramio style map overview with photos overlaid would be cool.
But the first point shouldn't hopefully be too hard to do!