I Highly Appreciate what Mr. Laurence_Cox suggested.
I suggest you start inviting your friends to see this link and add supportive comment so with many comments, Panoramio team might listen to our suggestion and bring it alive! Who knows within 2 or 3 months this issue might be used in Panoramio groups.
And adding a search engine is not a difficult issue for Panoramio team, because they already can have access to the biggest search engine on this planet with the most complicated algorithmic calculations (Google). they just have to integrate it into Panoramio and here we have it a fast and important reach tool for what we have in our groups, and this would be helped by how people Name their and How They Tag Them (By the new proposed tagging system)
This would help moderators and owners to reach specific members or photos as well as for other porposes (like a certain person want to select a specific category of photos)
I feel optimistic about this issue and i feel it would go to light but who knows when, at least we had the honor to propose it first...
Happy New Year
NB: Thanks for Mr. Draken correction!
Regards;