I did some test with the tilt-shift techniques en retro-actions and suddenly i'm using the google streetview images to make old postcards from. It's a great and rich database of milions of nice spots to make postcards from.. Just add "greetings from.." and your card is ready..
Its weird and cool at the same time to see modern interface elements (like the arrows and lines coming from the google streetview layer)
This could be a great service google-maps could privide it's viewers..That's what I think!