> Please tell me where could be wrong. Thanks!

I've used everything from Picasa to iPhoto to some of the Linux-based solutions like F-Spot.

I have no idea what your product does. It reminded me a lot of the paragraph at http://www.ycombinator.com/howtoapply/ that starts with, "The best answers are the most matter of fact. It’s a mistake to use marketing-speak to make your idea sound more exciting. "