It's funny because there are so many people on HN and Reddit, for example, who don't capitalize on creating small niche services because there's already a Flickr, or already a Youtube and whathaveyou.
So I think you've done a good job here.
I think you could probably market $10 better. Remove the struck out $20 and just prominently and proudly display the $10.
As a risky marketing move, how about refunding all users who paid $20 the difference? What a great way to get them talking about you on Twitter, Facebook, etc. when you deposit their account with $10. It's a nice surprise.
Just an idea. Good luck.
The way it stands is you're offering a pretty page for photos at $11 that doesn't target any real customer niche and does what a Tumblr blog paired with a Flickr account would do for free in a more flexible way.