Add your 500px.com photo gallery to a page using the [jsg500px] shortcode.
This is plugin lets you add your 500px.com gallery to a page in your blog using the [jsg500px] shortcode. The gallery is made with galleriffic and the images are retrieved from 500px.com using the user feed.
It's possible also to define a custom CSS in your template folder to customize completely the gallery.
See the plugin in action here: http://micz.it/fotografia/