I don't have an answer for you, my point was that the majority of users who will find your service will have their photos elsewhere already and it requires some

I don't have an answer for you, my point was that the majority of users who will find your service will have their photos elsewhere already and it requires something to make them move. Photos are a saturated market. I don't have any killer features to suggest, and I don't mean to make it sound like you're dead in the water - far from it. You're a young startup with a fairly solid site from the looks of it, it just didn't show me anything which would entice me to move photos to your site. As for your feedback on Flickr, you and I may feel that way, but the millions of users they have are in love with the service. Swaying someone who loves a product is like trying to convince someone to switch religions, it's nigh impossible. I'll look forward to seeing how your site shapes up over time.