Really cool - for some reason attaching geolocation to abstract pictures make them seem so much more real and interesting. Seems to be cracking a little under HN traffic?
But not having some form of geolocation can also add some mystery to a picture, making it more interesting in another way. But I like the idea to ask people via the internet where a certain photo was made. I have sometimes wondered where some interesting looking location, that I have seen on a photo, can be found. One problem with an internet community based solution could be copyright, if people are allowed to submit arbitrary scans of copyrighted material for identification.
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I've had quite a good time browsing Google Maps with the photo layer turned on, while looking at remote places with which I am familiar (mostly the Colorado River and Rio Grande, but also Caribbean islands). But it would be nice to be able to pull in more 3rd party data like these photos within the maps interface.