Hi, I think it's been raised before but a much needed feature is the ability for other users to submit a "correction" for the locations other people have pinned their pictures.
I'm not sure if you guys have used Google Maps much, but logged-in users can click on the marker for a shop/location/etc and select "move marker" which gives them a graphical interface - a map - on which they can select what they think is the correct location for the item.
It would be great if Historypin had this feature.
Obviously it would submit the location to HistoryPin staff for approval
... OR ... maybe you could leverage the users and have some section where they go to approve other people's changes, with X number of users required to approve before the location is changed, and you can't approve your own. It would be very similar to the "GeekMod" approval system on the well-known site BoardGameGeek.com which has been using that concept for many years.
There are three problems with people pinning pictures, and I think that people making an honest mistake is the least of these problems.
Most organisations that I've seen add pictures to Historypin just dump them in one pile on the one spot - like 65 pictures. They don't have the time or interest to place the pictures in their correct locations. That's a shame, especially when other people might be keen to place them.
Other people seem to just randomly drop pictures anywhere on the map. Buildings in the wrong suburb, the wrong city, even the wrong *hemisphere*.
I hope that you're still considering suggestions. :-)